So since my volume test I’ve loaded the 9.3x62 up to 58.5gr of RL15 with 270gr bullets. Primers started to flatten with this load. Ive loaded the 375 Whelen Improved up to 58.0gr of RL15 and a 270gr bullet with no pressure signs. I’m going to shoot 58.5gr this weekend. I think my theory was correct, that I could use 9.3x62 load data for the 375 Whelen Improved.
JTD
So I’ve settled on a load for my 375 whelen improved, with the 270gr Speer sp and 58.0gr RL15. It has turned in sub moa groups each time Ive shot it. I shot it over the chronograph today, avg velocity is 2512fps. I’m plenty happy with that.
JTD
Not sure why it took me this long to find this thread but it’s great that they are so similar! Nice to at least have a base to start at!
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Exactly! I started tentatively loading for this rifle when I got it because the 2 sources I had for data, were very different. Since I did the volume test, I’ve been loading and shooting it much more often.
JTD
Fun! Hopefully you can get it some in-field experience this fall!
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