375 H&H - Come on, der må være flere.....

[Heimann]

Ladedata fra Woodleigh vedr. 350 grain.

350 grain Woodleigh loaded to cannelure
Federal 215 primer
24" barrel

IMR4895 (H4895)
85% load density -> 61.9 grains -> 2239 fps -> 60,031 psi
90% load density -> 65.5 grains -> 2397 fps -> 66,271 psi -> exceeds MAX
95% load density -> 69.2 grains -> 2543 fps -> 73,266 psi -> exceeds MAX

IMR4064
85% load density -> 61.4 grains -> 2158 fps -> 57,572 psi
90% load density -> 65.1 grains -> 2293 fps -> 61,018 psi
95% load density -> 68.7 grains -> 2446 fps -> 68,277 psi -> exceeds MAX

H414
95% load density -> 71.3 grains -> 2236 fps -> 53,726 psi
100% load density -> 75.0 grains -> 2427 fps -> 59,894 psi
105% load density -> 78.8 grains -> 2670 fps -> 70,927 psi -> exceeds MAX

SAAMI maximum pressure is specified at 62,000 psi.

Looks like H414 is you best choice for maximum velocity. 4831 may be a good choice as well. If I get time later I may simulate that powder for you also.

However, for your interest, here are some loads we worked up during testing of the 350 grain SN RN and PP.
350gr RN 68 grains H4350 Federal 215 primer 2300 fps
" " 70 grains " " " " 2345 fps
" " 72 grains " " " " 2363 fps
" " 74 grains " " " " 2375 fps

350 grain PP 72 grains H4350 Federal 215 primer 2380 fps
" " " 73 grains " " " " 2250 fps

H414 is similar burning rate to H4350, so your 70 grains load should give about 2345 fps.

Regards,
Geoff McDonald.
WOODLEIGH BULLETS

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