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Thread: ?'s regarding twist rates and # grooves

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    Default ?'s regarding twist rates and # grooves

    I've been kicking the idea of building a custom gun. I was going to order a Weatherby Ultra Lightweight gun, but for the money I think I can build a nice one for a little bit more money and be a lot better shooter. I'm going to probably order an action from Pierce Engineering and have them install a Lilja barrel. My question is what twist rate and number of grooves to get and which contour? I'm planning on a 300 Weatherby and want the gun to be light. Thanks

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    Member Matt's Avatar
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    1 in 10" twist with a # 1 or 2 contour.

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    Member Matt's Avatar
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    Forgot to add that I've had good luck with pacnor 3-groove barrels.

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    What bullets are you thinking of using?
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    I've had pretty good luck with 180 grain Accubonds and TSX's. That was with a Mark V 26" barrel though. I'm trying to figure out which barrel to use now, I've had good luck with my Lilja barrel and am leaning in that direction right now. I am thinking right now probably a 22" or 24" with a number 2 contour, 1:10 twist, and 3 groove. I'm not sure at which point in barrel length is there diminishing returns for a magnum cartridge. I'm basically wanting to build a Remington Ti (1st Gen) in a 300 Wby. I need to find a light stock next. There is a long lead time though with the action and barrel. Any of you know what contour was used on the first Gen Ti model? Suggestions?

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    The first generation TI's had a standard Rem Mtn Rifle contour barrel, but they did not chamber any magnum cartridges in the first generation TI's. Having said that, I have built a dozen or so rifles on the TI actions, in numerous magnum chamberings. I have found the number 1 or 2 Lilja contours better then the factory Rem Mtn Rifle countour (Dan Lilja has the Rem Mtn Rifle contour, if you decide to go that route just order it that way....listed in the factory contour tab on their website)

    As far as twist rate, if that 180 gr is all you are going to shoot and nothing heavier the 1-12 twist rate is a better choice. With the 1-11 being a close second. Either one of those will give you all the stability you will need in that bullet weight at less chamber pressure. The 1-11 is my go to twist rate in 30 caliber rifle builds........ in the 3-groove version. That large magnum cartridge should be chambered in a 24" barrel.

    Go with the Hunter's Edge model stock from McMillan. Though this is a 6 month plus wait time currently. Tell them exactly what action, floorplate, barrel company, how long the barrel shank will be and contour you choose and McMillan will have it inletted for you at no additional cost. Second.... would be a High Tech Sheep Hunter model stock but there is no choices as far as High Tech inletting for different barrel contours, floorplate choices etc....it is just made for particular action models but it is half the cost and minimal weight time.

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    Quote Originally Posted by sheephunteralaska View Post
    As far as twist rate, if that 180 gr is all you are going to shoot and nothing heavier the 1-12 twist rate is a better choice. With the 1-11 being a close second. Either one of those will give you all the stability you will need in that bullet weight at less chamber pressure. The 1-11 is my go to twist rate in 30 caliber rifle builds........ in the 3-groove version. That large magnum cartridge should be chambered in a 24" barrel.
    Yup there ya go. Unless your wanting to shoot real heavy bullets (220/230) a 10 twits is a bit fast for 300wby velocities, Wby is a fast round and speed makes RPMs too so you want a tad less twist than same bullet needs from something slower like 06. If your shooting 180s and under all the time 1/12 is a better choice and 11 is a good compromise for a guy that shoots a lot of middle weight bullets with the occasional 200/220g pill.
    Andy
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    Quote Originally Posted by KLK View Post
    I've been kicking the idea of building a custom gun. I was going to order a Weatherby Ultra Lightweight gun, but for the money I think I can build a nice one for a little bit more money and be a lot better shooter. I'm going to probably order an action from Pierce Engineering and have them install a Lilja barrel. My question is what twist rate and number of grooves to get and which contour? I'm planning on a 300 Weatherby and want the gun to be light. Thanks
    Quote Originally Posted by KLK View Post
    I've had pretty good luck with 180 grain Accubonds and TSX's. That was with a Mark V 26" barrel though. I'm trying to figure out which barrel to use now, I've had good luck with my Lilja barrel and am leaning in that direction right now. I am thinking right now probably a 22" or 24" with a number 2 contour, 1:10 twist, and 3 groove. I'm not sure at which point in barrel length is there diminishing returns for a magnum cartridge. I'm basically wanting to build a Remington Ti (1st Gen) in a 300 Wby. I need to find a light stock next. There is a long lead time though with the action and barrel. Any of you know what contour was used on the first Gen Ti model? Suggestions?
    If you're using a Pierce action and top shelf barrel, I cannot fathom using anything but a McMillan stock with their Edge fill. I'd also be looking at their KS pattern for your stated goal. 24 inches is enough barrel for the 300 Bee, but I'd not go any shorter and though various manufacturers all differ, I'd be looking at a #2 Pac-Nor or equivalent size. Sounds like a useful rifle, though I'd be thinking 300 Winchester Magnum in the same platform if I had to have a .30 caliber hunting rifle...............
    Foolishness is a moral category, not an intellectual one.

  9. #9

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    Ordered it this morning. Lilja barrel 1-11 twist, 3 groove, 24" with a titanium long action from Pierce Engineering Ltd. 6 months lead time, same goes for the Mcmillan light weight stock. 1900 for the action and barrel, going to be about 550 for the stock.

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    Sponsor ADfields's Avatar
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    That will be a dang nice rifle.
    Andy
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    Member 1Cor15:19's Avatar
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    Quote Originally Posted by KLK View Post
    Ordered it this morning. Lilja barrel 1-11 twist, 3 groove, 24" with a titanium long action from Pierce Engineering Ltd. 6 months lead time, same goes for the Mcmillan light weight stock. 1900 for the action and barrel, going to be about 550 for the stock.
    Sounds like a killer for sure. Post some pics when you get it finished if you do not mind.
    Foolishness is a moral category, not an intellectual one.

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    Final assembly this week and should ship out next week. The stock had the longest lead time (7 months), but weighed in at around 2#. Don't have the final weight of the rifle yet.

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    Quote Originally Posted by 1Cor15:19 View Post
    Post some pics when you get it finished if you do not mind.
    It'd be cool to see the whole build detailed in a running picture thread. Gotta love gun porn!!!

  14. #14

    Default Titanium 300WBY

    Well here it is Pierce Engineering Titanium Long action, Lilja Barrell SS #2 Contour 11 twist 24", McMillan Hunters Edge 14" LOP w/Pachmayr pad, Timney Trigger, Titanium Muzzle break, Ceracoted Sniper Gray. $3600 was the total bill.
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    Default Titanium 300WBY

    Gun weighed in at 6#.

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    Member Matt's Avatar
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    I like the build. Very nice rifle you had assembled. What scope and rings you going with? Bullet choice?

  17. #17

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    http://nightforceoptics.com/compacts...ct-riflescope/
    I'm going to go with the small nightforce with talley rings. I'm planning on trying 180 or 165 Barnes TSX bullets or Nosler Accubonds.

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