45-70 and H335 pushing 350 +/- 5 or 10 grs, boolits?
Lurked here for years, friend brought me in to the light - first post.
What can you tell me about H335 with cast boolits in a 45-70? CVA Scout is the rifle I'll be loading. (Read some good threads on H335 behind 405 gr, but didn't find any for boolits in the 350 range)
Im an experienced reloader- but just getting started on cast for rifles.
45-70 and H335 pushing 350 +/- 5 or 10 grs, boolits?
I’ve tried H335 in several cartridges with cast.
I don’t like it. Inconsistent report, high pressure with book loads. Yes, I used magnum primers.
I haven’t tried it in 45-70, though.
I have decided to only use H335 in jacketed loads- mainly in .223- where it shines.
Welcome to the forum!
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Some results with H335 and 345gr PC in my CVA Scout
Cast a couple hunnert from my Lee 457-340-F. Alloy I used dropped 'em at 345 with about 10 BHN. After PC with Smoke s blue ( thanks to TCLouis), measured dia was .461. Dummy round chambered just fine, so did not size em. Slugged barrel, got .457 groove to groove.
All loads were standard primers (WLR) and Remington brass
45 grains H335:
# FPS
5 1426
4 1752
3 1420
2 1549
1 1605
Average: 1550.40
StdDev: 137.94
Group Size (IN): 3.57
46 grains (Chrony failed to read one)
# FPS
4 1801
3 1769
2 1240
1 1619
Average: 1607.25
StdDev: 257.37
Group Size (IN): 5.75
47 grains
# FPS
5 1829
4 1827
3 1874
2 1891
1 1763
Average: 1836.80
StdDev: 49.81
Group Size (IN): 3.46
48 grains
# FPS
5 1896
4 1835
3 1690
2 1707
1 1807
Average: 1787.00
StdDev: 87.17
Group Size (IN): 3.51
49 grains
# FPS
5 1787
4 1755
3 1808
2 1846
1 1762
Average: 1791.60
StdDev: 36.96
Group Size (IN): 1.83
I also shot a 5 shot group with 50 gr H335 behind a 361gr gas checks with Alox. Avg was 1830 and group measured 1.3"
shot some JHP 300 gr with 62gr H335 and got around 2100 and decent groups,,,meaning consistent at an inch. Lesser loads were crap for consistency.
I played around with some other load and bullet combos, and at least with my rifle, seems that H335 has potential with 350-ish boolits with charges above 49gr. Lesser loads were erratic.
BUT, got excellent results with 49 gr IMR 3031 with the 345 gr Lee cast, PC boolit. Consistent velocity around 1800 and very nice round 1" groups. Results for another thread maybe... this load will be my hunting load this fall