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Thread: New Bullet for 3006 Marlin XL7 load work

  1. #1

    Default New Bullet for 3006 Marlin XL7 load work

    GS Custom 150gr HV


    I will be loading the GS Custom 150gr HV for my 3006 Marlin. I have loaded this bullet in my Weatherby Mark V 30-06 and reached 3154fps with a 24" barrel and very accurate with the most accurate load moving 3120fps. With RL-17 I should with my a 22" barrel reach just at 3100fps. With W760 and possibly Ramshot Hunter I will get 3020fps to 3050fps. The driving bands really make this possible and I have experienced the above mention velocities without going over max due to the GS Custom HV bullet's driving bands. Also, not only are they accurate but very effective on game and better than the TSX or TTSX after using both the GS HV and the Barnes TSX (and TTSX at the end) for a 4 year period from 2006-2010 (also the TTSX into 2011) on hunts with 4 different calibers, ending my field tests with these bullets in 2011.

    At that time I had to purchase the GS HV bullets from South Africa and then through a second party (making them hard to come by and shipping was a killer) at the time, but are now produced for the US market right here in the USA in their new manufacturing facility in Indiana. Will be interesting to see how they shoot in my Marlin XL7 30-06 and if accurate I will use them some this coming fall, because I do know how well they perform terminally from past experience.

    I am not giving up my cup core or bonded bullets, that you all know I like so much. The standard and traditional bullets have a spot to fill and do very well terminally, but I also am very impressed with what I have seen the GS HV Custom bullet do terminally. Anyway, it will be fun developing loads, sharing the data and results with you all and using them on my up coming hunts. I love to find ways to have fun when it comes to developing loads, shooting and testing them on my hunts.

    Looking at Saturday morning to test four powders with the GS 150gr HV.

    Cartridge on top of rifle is my 180gr Ballistic Tip load


    I know some might complain about the cost of the bullets saying they can do what the GS does with their standard bullets and for much less. Well you can't do what this bullet does no matter how you want to slice it with standard bullets when it comes to exceptional velocity you get for the cartridge used. You all know how much I like standard bullets and the range of bullets I have tried on hunts and in culling events I have been invited to take part in. Anyway, the bullet is the cheapest thing about your hunt so why cut corners? That is why I have in the past spent the money on North Fork bullets for some hunts.

    I have seen a GS 150gr HV out of a Ruger Hawkeye 30-06 at 3055fps at muzzle go from a frontal shot in the chest of a bull elk at 60yds and exit the back side of his right rear ham and he folded up and clasped in his tracks. Both me and my hunting buddy (who made the shot) were totally surprised, and just stood there looking at each other for a moment. When the elk was dressed the bullet's wound channel was not only impressive but it travel in a perfectly straight line (no major bone was hit on this shot just barely missed the large leg bone in the back leg).

    He and I were both sold on the GS HV from that day on, just could not get them without a lot of trouble so in 2010 I stopped trying to get them. I would take it any day over the TSX which I have never been that impressed with though many are. Anyway, since I now can get a hold of them much easier and with less shipping difficulty, I will be back to testing them at the range and on game this coming year.


    Link to GS Custom Bullets USA: http://www.gscustomusa.com/products.html
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  2. #2

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    I have not been able to get to the range yet due to weather and work, but hopefully this coming week to see how my loads do in the Marlin XL7.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  3. #3

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    To day went exceptionally well. Tested the 150gr GS HV Custom bullet with four powders in my Marlin XL7 30/06 22" barrel (all loads just under max).

    RL-17 = 3076fps average .998" group (ES and DV not low enough)

    W760 = 3045fps average 1.211" group (ES and DV not low enough)

    IMR4350 = 2923 average .868" group (velocity to low, ES-23 and DV-11)

    H4895 = 3055fps .564" group (very good velcity and outstanding ES-7 and DV-4)

    Top velocity of the day was 3088fps RL-17


    Most accurate group today was IMR4895 at .564" moving 3058fps, 3051fps, 3058fps with average at 3055fps Extreme Spread 7 and Deviation 4


    Ballistics for my LR Duplex in my Leupold FX II 6x36mm scope is as follows:
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  4. #4

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    NOTE: HV bullets are therefore designed to start mushrooming reliably from much lower speeds than most other premium bullets, typically from around 1000fps. Two to four centimeters of penetration is all that is required to fully expand an HV bullet.

    Muzzle 3055fps engery 3108.4

    100yds 2804.8fps engery 2620.1

    250yds zero 2454.5 engery 2006.5

    400yds 2130.4fps engery 1511.6

    500yds 1928.7 engery 1238.9
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  5. #5

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    Mike,

    Probably no surprise to you of my interest in this thread. I think the GS bullets are the best killers by design than any other although I have no hunting experience with them. I'm surprised you didn't go with the 160's or 173's, so feel free to explain

    I've tried the 177's in my 300 RUM with an MV of about 3500 fps, but acuracy wasn't great.... a little more than MOA. To be fair, GS recommends a 9 twist (for hunting) and I was shooting a 10 twist and at the velocity and altitude I shot them, I think they should have been stable on paper which they seemed to do. The 177's are extremely designed for best BC and because of length tail and nose they have minimal bearing surface and minimal adjustment for seating depth.

    The other 308 offerings are a different story and if I were a short to mid range hunter only, GS bullets would be at or near the top of my list.

    Unlike TSX's, their petals are designed to shed like shrapnel at high velocities and the frontal of the body is designed to expand in a flat frontal area which creates a greater permanent wound channel.

    Did I miss anything
    "You will never know how much it cost my generation to preserve your freedom. I hope you make good use of it."
    ~ John Quincy Adams

  6. #6

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    First, the recommended bullet for the 06 by GS is the 150gr HV and considering how long the other two .308 bullets you mentioned are, they would take away case space and defeat what you want in driving the HV and get its potential velocity in whatever cartridge you are using so that demands high velocities. Also if you will note their rate of twist charts and see what can and cannot be accomplished with the 150 and the two you mentioned you will see that the 150 is optimum for my 06 with a 22" barrel.


    To summarize: 1. The driving bands allow more velocity (grooves like on the TSX and TTSX can not compete here). 2. The velocity gained by the drive bands allow me to have over 2600fps which if so the petals come off. This is a good thing (Banes actually wants their petals to stay on as long as they can and are not designed to come off at 2 too 4 centimeters and keeping the petals on is not always good). The GS wants them off at high velocity over 2600fps because it allows for the bullet to have a flat meplat which in turns creates a cavitation that makes a larger wound channel (the TSX does not compete here) and allows the bullet to be suspended in a bubble and this low pressure bubble makes it possible for the bullet to travel in a straight line and not tumble or change directions as it is protected by this bubble. Therefore, it becomes a very good big and dangerous game bullet providing deep penetration and superior wound channel. 3. It begins to open up before other monolithic bullets even those with tips and it fully opens at 1600fps making it idea for deer size game. You get the best of both worlds so it works on deer size game and moose size game and dangerous game all in one bullet. Another note is that the GS and its driving bands do not cause increased pressure spikes if the bullet touches the lands and therefore not as finicky as the TSX nor is it vital to give it a big jump which you have to with the TSX.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  7. #7

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    Yup, the bore rider/driving bands design of the GS bullets do allow for greater velocity. I found about 70-80 fps more with the 177's vs 180 E-Tips out of my RUM. I believe most 308 cal rifles have a 10 twist which would stabilize the 173's to an SF of 1.25 and the 160's to an SF of over 1.6 which is what GS recommends for dangerous game and brush hunting, and 1.4 for general hunting to 500 yds.

    I know a Long Range guy here in Montana who used the 177's for hunting and killed antelope, deer and elk with them at various ranges and I think he was using a 10 twist 30-Lapua mag Imp. I'll be giving the 177's another go in my new 300 RUM and see if accuracy is any better. They seemed to stabilize OK in my previous RUM, making nice round holes. Just not as close together as I like.

    It's true the 150's will get more MV which is Gerard's philosophy behind his bullets, but the greater BC of the 160's will be catching up to that velocity fairly quick down range.

    I've started playing with Cutting Edge bullets and will be testing them out in my new rifles in 6-284, 6.5 WSM and the new 300 RUM. They are accurate and easy to load for.

    Looking forward to your hunting results with the GS bullets. Should be very interesting.
    "You will never know how much it cost my generation to preserve your freedom. I hope you make good use of it."
    ~ John Quincy Adams

  8. #8

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    Quote Originally Posted by MontanaRifleman View Post
    Yup, the bore rider/driving bands design of the GS bullets do allow for greater velocity. I found about 70-80 fps more with the 177's vs 180 E-Tips out of my RUM. I believe most 308 cal rifles have a 10 twist which would stabilize the 173's to an SF of 1.25 and the 160's to an SF of over 1.6 which is what GS recommends for dangerous game and brush hunting, and 1.4 for general hunting to 500 yds.

    I know a Long Range guy here in Montana who used the 177's for hunting and killed antelope, deer and elk with them at various ranges and I think he was using a 10 twist 30-Lapua mag Imp. I'll be giving the 177's another go in my new 300 RUM and see if accuracy is any better. They seemed to stabilize OK in my previous RUM, making nice round holes. Just not as close together as I like.

    It's true the 150's will get more MV which is Gerard's philosophy behind his bullets, but the greater BC of the 160's will be catching up to that velocity fairly quick down range.

    I've started playing with Cutting Edge bullets and will be testing them out in my new rifles in 6-284, 6.5 WSM and the new 300 RUM. They are accurate and easy to load for.

    Looking forward to your hunting results with the GS bullets. Should be very interesting.
    I am getting 150fps faster velocities in my 06 over my favorite standard 150gr bullet out of this same rifle. Significant. With this GS load I am zeroed at 250yds and only -5 at around 340yds. The 150gr is more than optimum for my 06 with a 22" barrel and I am still holding over 2000 pounds of energy out to 250yds and on top of that I exceed 2600fps out to 185yds making my HV a very powerful dangerous game bullet out to 100yds for sure, much less large game. I will not be able to get the heavier HVs for this caliber to beat the ballistic of the 150gr because I can't drive them fast enough to do so or to make those heavier HVs an all around versatile bullet for my 06 as the 150gr is and on top of that can't drive them fast enough to really catch up with the 150 and be an improvement on ballistic. With the HV bullets we will have to get over the notion that more weight works better, because it does not if the velocities are not there. Of course I have tried all of this in the past and know from experience.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  9. #9

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    Yup, with the HV bullets high velocity is a good thing and when shooting at closer ranges the lighter bullets work well. But for longer ranges, higher BC is best for maintaining velocity down range and the 177's are best suited for that and if I can push them 3500-3600 fps it accomplishes the same effect down range as the lighter bullets do closer in. And even at lower velocities, they still function like standard bullets with petals intact which is OK.
    "You will never know how much it cost my generation to preserve your freedom. I hope you make good use of it."
    ~ John Quincy Adams

  10. #10

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    Quote Originally Posted by MontanaRifleman View Post
    Yup, with the HV bullets high velocity is a good thing and when shooting at closer ranges the lighter bullets work well. But for longer ranges, higher BC is best for maintaining velocity down range and the 177's are best suited for that and if I can push them 3500-3600 fps it accomplishes the same effect down range as the lighter bullets do closer in. And even at lower velocities, they still function like standard bullets with petals intact which is OK.

    You answered your own question concerning why I do not use the heavier bullet and chose the 150gr HV. I can't in an 06 push the heavier HV bullets to make them superior to the 150gr HV in the 06. The heavier ones would be awesome in the 30 caliber magnums.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

  11. #11

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    Yeah, I understand why you are shooting the 150's in the 22" 30-06. Will be looking forward to your hunting report.
    "You will never know how much it cost my generation to preserve your freedom. I hope you make good use of it."
    ~ John Quincy Adams

  12. #12

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    Yeah, I am looking forward to hunting season period but this will be fun using the GS HV again.
    A GUN WRITER NEEDS:
    THE MIND OF A SCHOLAR
    THE HEART OF A CHILD
    THE HIDE OF A RHINOCEROS

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