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338-378 with Barnes 265 LRX

338-378 with Barnes 265 LRX
« on: October 30, 2017, 05:07:56 PM »
Kind of a shot in the dark, does anyone have any COAL lengths that have worked for these bullets? I've got my powders and weights, but concerned with the length of the bullet that will be in the case and compressed loads...

Thanks,

224KING

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Re: 338-378 with Barnes 265 LRX
« Reply #1 on: October 31, 2017, 06:45:49 AM »
Start with just under your magazine length.That's as log as your going to get unless you manually load chamber and not use the magazine.Make rounds as long as you can then play COAL going down to tweak accuracy.
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Re: 338-378 with Barnes 265 LRX
« Reply #2 on: November 02, 2017, 03:57:37 AM »
That is the plan, just have to do it and find out. I did do some research and looks like my COAL for magazine will be right around what some of the other .338s are, as far as seated depth from published data. Thanks,

224KING

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Re: 338-378 with Barnes 265 LRX
« Reply #3 on: November 02, 2017, 05:32:16 AM »
Sorry I couldn't be more help.You might PM Chris338378
Sorry... Yesterday was the last and final day for any and all complaints whatsoever.

I try to avoid temptation unless I can't resist it.

Everyone has a photographic memory.Some just don't have film.

Re: 338-378 with Barnes 265 LRX
« Reply #4 on: November 10, 2017, 06:41:11 PM »
Reloaded H-1000 and Retumbo, with 3.810" COAL.  Started to hit a little compression on 106-107 grains for both but still room in there, result of seating the bullet so deep. H-1000 @ 107 grains 2962fps, Retumbo @ 108gr 2973fps, going to work more loads up, no pressure signs. Was starting to group really well for the last few steps on each(1 grain steps) and only 1 shot each. Stock 2001 Weatherby Accumark.

H1000
107c   2962.2
106c   2931.9
105c   2905.2
103   2864
101   2830.8
99   2765.7

Retumbo
108c   2973.9
107c   2944.4
106c   2901.1
104   2836.6
102   2804
100   2755.6
« Last Edit: November 11, 2017, 05:34:19 PM by loresonde »

Re: 338-378 with Barnes 265 LRX
« Reply #5 on: November 17, 2017, 08:49:49 AM »
Sorry I can't help you out too much because I never loaded any Barnes heads for my rifle but here's what I do know.  I was checking out the head you're loading and Barnes has it listed to be used with the .338 Lapua and the only reason I could think of why they listed it that way is because of is because they're concerned about the length of it, which is 0.050 longer than the 250 grain version and is a decent difference in length, and the size of the magazine well in the rifle.  I know H-1000 is an accurate powder for the .338-378, Nosler even lists it as the most accurate powder with their heads in 180, 200, and 210 grains.  When you get into the Nosler heads that are 225 and 250 grains the most accurate powder they used was Viht N165.  If they have a load listed with the Viht N165  I'd give that a try and see how the accuracy is.  As for the COL, I'd start out a tad short of the length of the magazine well because many people have said based on their experiences Barnes bullets like longer COL's.  Also I would base my group assessment on three shot groups, a single shot isn't going to tell you anything about how well the rifle groups the load you're testing.
Nothing is better than a Weatherby, big bore magnum, or a Colt.

Re: 338-378 with Barnes 265 LRX
« Reply #6 on: November 20, 2017, 09:00:07 AM »
Sorry I can't help you out too much because I never loaded any Barnes heads for my rifle but here's what I do know.  I was checking out the head you're loading and Barnes has it listed to be used with the .338 Lapua and the only reason I could think of why they listed it that way is because of is because they're concerned about the length of it, which is 0.050 longer than the 250 grain version and is a decent difference in length, and the size of the magazine well in the rifle.  I know H-1000 is an accurate powder for the .338-378, Nosler even lists it as the most accurate powder with their heads in 180, 200, and 210 grains.  When you get into the Nosler heads that are 225 and 250 grains the most accurate powder they used was Viht N165.  If they have a load listed with the Viht N165  I'd give that a try and see how the accuracy is.  As for the COL, I'd start out a tad short of the length of the magazine well because many people have said based on their experiences Barnes bullets like longer COL's.  Also I would base my group assessment on three shot groups, a single shot isn't going to tell you anything about how well the rifle groups the load you're testing.

Thanks, from my research the 338 lapua designation was mostly because the bullet was designed to perform better at the velocities and energy downrange that a 338 lapua can produce. The are long bullets that is for sure, I loaded all just shy of magazine length to ensure the would feed and eject. My comment about grouping was purely an observation that even with different powders and grains, they were staying consistent. I have developed loads for this gun on 225gr, 200gr and even some 160gr going 3500fps(crazy), but want to use the heavier 265 for possible long range larger game hunting. Got the 7mm Weatherby for others.


I just shot some more loads and found my load for this gun,

Retumbo maxed at 109 gr with a bolt tight and an ejector mark, 3034fps on that one shot.
H1000 maxed at 111 gr with a tight bolt and ejector mark as well, 3110fps on that shot.

Going to drop 1.5 gr to 109.5 of H1000 and start shooting groups with them, faint ejector marks were seen at 110gr but a normal bolt feel. Should end up around 3080-90 fps with 265 Barnes lrx. Which is all good because the 150gr Barnes likes H1000 in my 7mm Weatherby too!
« Last Edit: November 20, 2017, 09:01:42 AM by loresonde »