24 April 2016, 03:37
richjWhats your fav. 375 Weatherby load
with 300 Swift A-frames.
Hodgdon says:
H414 = 79-84
H4350 = 80-85
H380 = 70-75
Hybrid 100V = 80-86
These are higher than QL by a bit.
I have RL15 and RL17 too
24 April 2016, 05:44
OngweI haven't loaded the A-Frame in the 375 Weatherby, but loaded the 300 TSX over 86 grains of H4350.
That was with Weatherby brass and Fed Magnum Large Rifle primers.
Seems like most data is soft on the Weatherby cartridges, I suspect because the free-bore/long throat deal and the fact the throat length varied so much. Originally it was .750" in length, then was shortened to .375" and until the cartridge was standardized, you had gun mechanics grinding reamers to every other length imaginable!
26 April 2016, 07:52
richjLoaded 81 and 82gr of H414 . 300gr Swift A-frames
Hope to get to the range, gotta remember the magnetospeed
29 April 2016, 02:53
eezridrDamn close to this load. I use 88 gr H4350. The rest being the same.
2790 FPS out of a 24" pipe.
quote:
Originally posted by Ongwe:
I haven't loaded the A-Frame in the 375 Weatherby, but loaded the 300 TSX over 86 grains of H4350.
That was with Weatherby brass and Fed Magnum Large Rifle primers.
Seems like most data is soft on the Weatherby cartridges, I suspect because the free-bore/long throat deal and the fact the throat length varied so much. Originally it was .750" in length, then was shortened to .375" and until the cartridge was standardized, you had gun mechanics grinding reamers to every other length imaginable!
04 May 2016, 09:52
Yentna River375WBY
300gr NOS/PAR
86gr H-4350
Win H&H cases fire formed
Fed 215 primers
2750fps (24" rem barrel)
350gr Woodleigh PP
88gr H-4831sc
Win H&H cases fire formed
Fed 215 primers
2510fps (24" rem barrel)
The 300gr load will shoot 1" to 1.5" groups.
The 350gr woodleigh is sub MOA.
Work up to these loads as usual. They were fine in my rifle. Could be warm in others.
