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338 Win Mag load

 
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  #1  
Old 04-20-2012, 12:41 AM
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338 Win Mag load

Need some help guys. I would like to push a 225 gr Barnes TTSX with H4350, but can't find any data. I'm hoping to get 2800 fps. Has anybody done some leg work on this one and have some data.

Thanks Much
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  #2  
Old 04-20-2012, 09:19 AM
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Re: 338 Win Mag load

Start around 65 gr and work up. It's usually easy to get to 2800 in most barrels (some guys load to 2900).
If I remember correctly, when I was working up loads for mine 71 gr H4350, Fed 215, Win Brass, 3.340 OAL @ 2860 fps. Accurate but it was a hot load in my gun.

Mine prefers H4831 with the 225's (73.5 gr, Fed 215, 2720 fps) the critters don't know the difference and the brass lasts longer.

Barnes manual - 67.5 gr IMR 4350 = 2753 fps @ 3.320 OAL was their accuracy load.

FYI: I contacted Barnes re: 225 TTSX minimum impact velocity for proper expansion and they replied - 1800 fps about 650 yrds (depending on your elevation, muzzle velocity etc) would give great expansion, 1600 FPS about 825 yrds will still expand. Based on that info, I use 2000 fps as a minimum and then the added range out to 1800 is a safety factor. IMO 1600 is pushing it.

Last edited by kermodie; 04-20-2012 at 12:02 PM.
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  #3  
Old 04-24-2012, 11:41 PM
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Re: 338 Win Mag load

Thanks Kermodie,

Anybody else have any experience with this combo?
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  #4  
Old 04-26-2012, 09:47 AM
sep sep is offline
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Re: 338 Win Mag load

Cavtrooper94,

I've been doin load development recently with my 338 WM and 225 TTSX bullets. My previous 338 WM loved IMR4350 but this rifle won't shoot IMR4350 or H4350 consistently. I have yet to get two groups in a row under one inch...and I've tried. I really wanted H4350 to shoot well because of its temperature stability but no dice. I would go from a 1/2 inch 3 shot group to a 2 7/8ths inch 3 shot group. Last weekend, I tried 75.0 grains H4831SC and got my first two groups to both shoot under an inch. Velocity is a little on the slow side though at 2715 fps. This weekend I'll be shootin more groups with H4831SC and chronographing em to confirm this load. BTW I've calculated the density of this load at 107+% using winchester cases and I've experienced no pressure signs at all.

In the past with my old 338 WM, I tried RL19 and RL22 but IMR4350 trumped em both in accuracy. That rifle had a 26 inch tube so my velocity clocked in at 2825fps.

I recently shot some Barnes VOR-TX 225 grain TTSXs to see how they performed. I got 1/2 inch groups with velocity of 2816 fps. I pulled a bullet and found a charge of 69.4 grains of a ball powder. I suspect it is a special run we handloaders can't get. Velocity is good however according to Ramshot on their website, ball powders cannot currently be made temperature insensitive so I expect different velocity from these factory loads in October here in Fairbanks. Consequently, I'll stick to the Hodgdon extreme line of powders.

As to velocity, H4350 at 68.5 grains started showing me ejector marks on the case heads at a velocity of 2805fps.

IMR4350 at 70.5 grains gave me a sticky bolt lift and ejector marks on the case heads...velocity clocked in at 2792fps.

I haven't taken H4831SC beyond 75.0 grains (yet) because I don't want to compress the load anymore than I have to, to get what I need. Since I haven't encountered any pressure signs I might try and bump it up a little in charge weight but I don't think I'll reach 2800 fps before running out of case room.

The bottom line is keep tryin powders and your barrel will tell you when you've found a match. Good shootin!
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  #5  
Old 04-26-2012, 12:45 PM
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Location: GSP, SC, USA
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Re: 338 Win Mag load

Quote:
Originally Posted by cavtrooper94 View Post

Anybody else have any experience with this combo?
"this combo"....close but no cigar. Same H4350-Barnes MRX 225-and 338WM.

Dec. 2008 I retired my 1953 Mod 70 F/W .270 and 140gr Black talons.
To replace it I required a:
338WM=Tikka T-3 SS Lite -no brake
225gr copper @ 3,000'/sec
225gr copper @ 3,000'/sec with a nose cone!
To get a 225gr @ 3,000fps I had to find a short bullet with short bullet bearing surface, or the excess preassure would stop me short of my goal. Enter the Barnes MRX 225. With the 4 cantalures, a heaver than lead suppository-to keep it shorter than a TSX- and a BT that allowed me to get 3,000 in 5 of 25 rounds in my last COAL test.

Don't try this in your rifle but start 15% lower and work up!!
My one load that I worked up.
73.5gr H4350 {MAX LOAD FOR ME = some Ejector marks}
225 MRX (now discontinued 2011??)
215 GM Fed match
Win Brass

Other MISC Info. {as you can tell I have the "NEED FOR SPEED"!}
The 7 were spread over 3 of the 5 groups of COALs. Why?????? No idea.
I could not get Clean Cold First shot nailed down and abandoned using up my high $$ bullets.
Like anything in my life ...if I like it they stop making it!!!! Can't have nothing, and my C drive croaked in Feb 2011 and lost most of my load details. While setting up my new Zeiss I discovered Nellie likes the Hornady-GMX-185s & dirty on top of that.

So, if~n you can't get all the "speed you need" from the TTSXs, find somebody that will sell you some of their private stock of 225gr MRXs. They will go faster than any other 225s for the above stated reasons. I have a life time supply (not for sale) of all of the 338 MRXs and TTSXs BUT, I now shoot the Superformance GMX185 ammo cause it is copper-I got my 3,080fps-cheaper-already loaded-kicks less than a 225 pill - is more accurate than my other clean cold first shots in Nellie and the D R T ELK will never know he got screwed out of 40gr of copper.

Good luck, you may not really have to have a 225gr and could use the GMX 185s at 3,080fps?
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  #6  
Old 04-26-2012, 05:51 PM
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Re: 338 Win Mag load

Thanks guys,

Sep I'm also in the Fairbanks area

Ol Man I agree the 225 isn't always necessary but I'm heading to Kodiak next spring looking for a big brown.
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  #7  
Old 04-26-2012, 08:38 PM
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Posts: 609
Re: 338 Win Mag load

Good luck on the brownie. The MRX came in 185, 225 and 250s also.
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Son, The first shot is the important one - the others just make him run faster! Grandpa 1949
NRA Life Member 1970
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