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338 Lapua Velocities?

 
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  #8  
Old 08-08-2008, 04:07 PM
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Join Date: Mar 2008
Location: Conrad,Montana
Posts: 16
Quote:
Originally Posted by jwp475 View Post
You are not going to get 50 FPS per extra inch of barrel past 24" IMHO and experience, at least not with normal pressure. I get about 2800 FPS with 92 grains of H-1000 with the 300 SMK and I have a 30" barrel
JWP475,
Are you shooting the Edge or the Lapua? Just curious if you are having any issues with blown primer pockets much over 2800.

Found a few notes on the Lapua from barrel brake in and load development.

Broz's rifle 27.5" barrel
- 250 gr SMK - 98 gr H1000 - 3045fps
- 300 gr SMK - 89 gr H1000 - 2681fps
- 300 gr SMK - 90 gr H1000 - 2704fps
- 300 gr SMK - 91 gr H1000 - 2751fps
- 300 gr SMK - 92 gr H1000 - 2780fps
Hogwild's rifle 27.5" barrel
- 300 gr SMK (Hunting Shack ammo)No reloads on this one,no brass
Very accurate but a little weak - Ave - 2670fps

Will include some other 338's since the notes are here in front me.
Gamedog's 338 Edge,27.5" barrel
-250 gr SMK - 96 gr R25 - 3062fps
-250 gr SMK - 97 gr R25 - 3109fps
-250 gr SMK - 98 gr R25 - 3115fps
-300 gr SMK - 94 gr H1000 - 2862 fps
-300 gr SMK - 94.5 gr H1000 - 2873fps (ES - 8 fps)
-300 gr SMK - 95 gr H1000 - 2893fps
Magnus's 338 Edge,31.5" barrel
-275 gr Hooker T-50 -96 gr H1000 - 3050fps
-300 gr SMK - 88 gr H1000 - 2730fps
-300 gr SMK - 89 gr H1000 - 2755fps
-300 gr SMK - 90 gr H1000 - 2776fps
-300 gr SMK - 91 gr H1000 - 2807fps
-300 gr SMK - 92 gr H1000 - 2830fps (primer pockets fail after 1 or 2 fireings) May be poor quality brass, Nosler failed much sooner than Rem.
338 RUM , 30" barrel
-300 gr SMK - 99 gr US869 - 2847fps
-300 gr SMK - 100 gr US869 - 2859fps (ES-8fps)
-300 gr SMK - 101 gr US869 - 2856fps (ES-2fps) (primer pockets fail at 1 or 2 loadings)
-300 gr SMK - 102 gr US869 - 2930fps OOOPS! (ES-28fps)
-300 gr SMK - 101.5 gr US869 - 2899fps (ES-22fps)
-300 gr SMK - 88 gr H1000 - 2807fps (ES-3fps)
-300 gr SMK - 89 gr H1000 - 2837fps (ES-31fps)(Primer pockets failing again!)
-300 gr SMK - 90 gr H1000 - 2847fps (ES-28fps)
-300 gr SMK - 91 gr H1000 - 2872fps (ES-22fps)
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  #9  
Old 08-08-2008, 05:51 PM
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Join Date: Dec 2007
Location: Ontario, Canada
Posts: 182
Quote:
Originally Posted by BHP9 View Post
ADI AR2225 is = to Retumbo and equivalent to RL25. As per ADI web site.

I posted this on Snipers Hide .

I was at the range Monday and chrono'd some loads.

All loads used the 250gr LockBase

94.0gr/Retumbo = 2846.8fps

88.5gr/Viht N165 = 2847.3fps

94.0gr/RL25 = 2868.3fps

3 weeks ago I chrono'd some Hornady 250gr BTHP factory = 2869.6fps

FWIW the N165 powder gave the best MAD but it was a stiff load and the cases were hotter to the touch on extraction.
I forgot to add that the rifle has a 26" barrel and that the screens were 15 feet from tthe muzzle.
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