7x57 MM ( .275 Rigby) load

S

Sea Buck

New member
I picked up a Winchester 70 Featherweight in 7MM Mauser for a song last week and want to load for it. On my shelf I have H380 and 4064. I am tired of crunching 4064 so am going to use H380. I will use a Speer 160 gr Grand Slam, just for old times sake, and from my old Sierra manual 40.0 grains of
H380. I picked up some .275 Rigby brass for the load. Any thoughts on this load before I proceed. Thanks.
 
What are using the rifle for i don't have any h380 loads on hand my guns seem to like 50 gr of imr 4350 with Sierra pro hunter 140s col off 3.100 only for modern actions
 
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