Anyone shooting the 225 gr MRX or TTSX in 338 Win Mag??

[cavtrooper94]

Just curious if anyone is loading for either of these. Whats your load, and what speed are you getting?

Thanks Much

 

[tradbowkill]

I load the 225 gr. MRX in my .338 Win Mag. I don't have the load data in front of me now but I can tell you that the load/bullet combo is one heck of a performer. I have shot both Moose and Grizzly bear with this load and was impressed with the results. The shot on the Griz was a quartering to shot, the bullet impacted on the right front shoulder and drove completely through the bear, ending up just under the hide on the left rear leg. When the bullet was recovered it had mushroomed perfectly and retained 100% of it's weight. This is my go to load for everything in Alaska.

Steve

 

[cavtrooper94]

That's just what I wanted to hear. If you would PM me your load I would appreciate it. Right now I am pushing a 225 Accubond at roughly 2950 fps. I would like to do that with the MRX but don't have much time to start from scratch.

Thanks Much.

 

[back country]

You sure did pick the right cartidge/bullet combo ! Be optimistically cautious with the MRX using Accubond loads, the accubond jacket material was developed to be less fouling = less pressure - I haven't tried the MRX yet so I might be peeing in the wind so just be cautious - If you could get that velocity range from the MRX 225 that would definitely be a "go to" ammo load, although I like the Accubonds you won't get that kind of performance out of one ...

 

[joebut1985]

i used the 225 gr ttsx last year and was very much impressed. i used imr 4350 at 69grns, thats what worked out good for me. I was fortunant to shoot a moose last year and recover my bullet. It still retained almost all of its weight and was perfectly mushroomed no broken pedals. I dont have any of speed recording's so sorry on that.

 

[HuntKodiak]

I just finished load development with the 225 ttsx for my ruger. Exact same load as joebut1985......69 grns of IMR 4350. Once I hit 67gr, the accuracy improved. I found jumping the bullet 105 thousandths to work the best. Seating the bullet that deep (the 225 doesn't get a .514 bc because it's short) puts the bullet into the powder. I'm tapping the case some to settle the powder before I seat the bullet to get a 3.330 COAL. No signs of excessive pressure with the 69grains, and the case removes easily.

I don't have a chrony so I can't give you the speed.

Like mentioned earlier, be careful jumping around with loads from other bullets. Shortcuts can hurt. For exmple, Speer reloading manual #12 gives a load range for a 225 gr BT-SP of 71-75 grains of IMR 4350. That far exceeds the recommended load data from Barnes for the 225 TTSX, and frankly, I'm not so sure I could jam a 225 TTSX on top of 71 grains of powder while keeping my jump the same.

 

[stid2677]

That's just what I wanted to hear. If you would PM me your load I would appreciate it. Right now I am pushing a 225 Accubond at roughly 2950 fps. I would like to do that with the MRX but don't have much time to start from scratch.

Thanks Much.

Only takes one trip to the range to shoot a ladder to find the limits of your rifle, powder, bullet combo. Shortcuts and internet recipes can get your hurt with reloading. If time does not allow for that shoot factory ammo until time allows for proper load development.

Bullets like TSXs, E-Tips and MRXs exhibit very different pressures than non monolithic bullets.

My last trip to the range working Accubonds and E-tips, I maxed out on the E-Tips several grains lighter than with the Accubonds. Same everything except the bullet.

Not trying to be rude, just would hate to see anyone get hurt or damage a rifle.

Respectfully

Steve

 

[needcoffee]

I just finished load development with the 225 ttsx for my ruger. Exact same load as joebut1985......69 grns of IMR 4350. Once I hit 67gr, the accuracy improved. I found jumping the bullet 105 thousandths to work the best. Seating the bullet that deep (the 225 doesn't get a .514 bc because it's short) puts the bullet into the powder. I'm tapping the case some to settle the powder before I seat the bullet to get a 3.330 COAL. No signs of excessive pressure with the 69grains, and the case removes easily.

I don't have a chrony so I can't give you the speed.

Like mentioned earlier, be careful jumping around with loads from other bullets. Shortcuts can hurt. For exmple, Speer reloading manual #12 gives a load range for a 225 gr BT-SP of 71-75 grains of IMR 4350. That far exceeds the recommended load data from Barnes for the 225 TTSX, and frankly, I'm not so sure I could jam a 225 TTSX on top of 71 grains of powder while keeping my jump the same.

Be careful jumping around from gun to gun. The differences in chamber size on different rifles can cause issues as well.

 

[HuntKodiak]

Not sure where you're going with your comment needcoffee? You're referencing my post, but I'm posting a COAL that 10 thousandths shorter than Barnes recommending COAL. Generally speaking, that very safe since reloaders often start with recommended lengths from the manuals if they haven't taken the time to measure the max COAL in their rifle (which I have).

For those speculating the wisdom in my posting my load specifics, I offer the info because each time I've taken on loading for a new rifle, cartridge, or bullet, I've searched for just this kind of info. I don't blindly follow, but take the info as potentially good insight provided it works in my reloading scheme. In fact, a few of you may have seen me ask for Barnes bullet jumps on other threads from people who have just found a sweet spot in a load. Bullet jump for Barnes bullets can be a finicky spec.

As I said in my post before......"shortcuts can hurt". I've given the OP insight to things I learned in my recent endeavor, but I don't recommend he follow my recipe blindly. My info may help, or it may not. And similar to what Stid said, I very seriously doubt I'd ever get the TTSX in my 338 to approach 3000fps. That would be too fast for the gun and bullet combo IMO.

 

[cavtrooper94]

Thanks Kodiak,

You hit it. I've got all the manuals and have done this a time or two. I would never just blindly load up someone else's max load, or even the manuals max load for that matter. I was just curious what others have already discovered.

 

[sep]

I'm getting a chronographed 2733 fps with 68.5 grains IMR 4350 and the 225 grain TTSX out of my 24 inch Weatherby 338 WM. I've got some loaded up for my Browning A-bolt 338 WM too...just haven't got out to shoot em yet.

 

[cavtrooper94]

From what I've put together talking to others 2730-90 is about right. I run a 24 inch barrel too. I was hoping to get these loaded up and get to the range before I had to leave, but unfortunately it's going to have to wait. My Afghanistan Safari got pushed up, so I'll have to dabble with this when I get back.

Thanks Much

 

[back country]

keep you head down and THANK YOU FOR YOUR SERVICE !!

 

[alaska bush man]

338 Win

338 Win

For the TTSX 73.0 of RL 19 with WW Brass and Fed 215GM primers works good in the 338 Win

As for 225 AB and 78.0 will give 2950 FPS.......excellent load in the 338 Win

 

[Armymark]

For the TTSX 73.0 of RL 19 with WW Brass and Fed 215GM primers works good in the 338 Win

As for 225 AB and 78.0 will give 2950 FPS.......excellent load in the 338 Win

Be careful with that load, the Nosler No.6 guide shows the 225 AB over 74gns of RL19 as a max load. This load for the same bullet is a full 4 grains over.

 

[Daved]

I have helped load the TSX in a buddies 338 win using IMR 4350 at 66.5g, 2660 fps from a ruger 24inch barrel. Consistently sub MOA. The TTSX should be close. The velocity/ballistics are just fine for critters to 300 yards. The same load shoots about 1.5 moa out of his Dad's Rem 700 in 338 wm. The two of them swap ammo. The brass is all full length sized and SAAMI spec. Did not chrony the 700 since he doesn't really care what the ballistics are so long as it is accurate to about 200 yards.

 

[cavtrooper94]

Be careful with that load, the Nosler No.6 guide shows the 225 AB over 74gns of RL19 as a max load. This load for the same bullet is a full 4 grains over.

I use the same load for my 225 Accubonds. You should always work up your own load for your own rifle, but mine are not showing any pressure signs. 2950 fps is awesome in a 338, and it shoots 3/4 MOA in my rifle.

 

[alaska bush man]

Just curious if anyone is loading for either of these. Whats your load, and what speed are you getting?

Thanks Much

My moose load for 2014

338 Win MAg

225 Barnes TTSX BT
Reloader 19 @ 74.0
Fed 215gm primer
WW Nickle Cases
3.340"

2830 FPS

 

[alaska bush man]

The Alliant website list 78.0 as MAX with the 225 gr bullet like the Nosler AB or Part/GrandSlam

Most of the manuals under load their loads since the early 1970's.

get a old Speer manual No 1 thru 5 and you will get some realistic loads with IMR powders.