all the 375 threads--post your loads

[kell2784]

With 5 threads running simultaneously on the 375, how about some guys post their loads.
FWIW I am also looking for 375 wby loads, using reg. 375HH brass. Do many anneal after fireforming?

 

[crazy_davey]

Being fairly new to the .375 I am working on some loads at the moment. Once I get something that suits my needs I will post up the info. Load development loads are not much use to most people.

I have had lots of fun so far though, and to me that is all that matters

 

[Dogleg]

I've got a few. I shot pails of practice loads made up of 300 Hornady roundnose and Higginsons 414ish surplus. 78 grains seemed to work best and backing off 2 grains for the 300 grain solids got both into the same group. 78 grains under both the 275 grain TSX and 300 grain Hornady solid shot together. The slightly quicker canister H414 and W760 got their best accuracy at 1 grain less on everything.
I've also shot 75 grains of IMR4350 with the 300 roundnose and 76 grains of RL15 with the 270 TSX.

 

[kell2784]

Thanks Dogleg, for now I'll be using the 300 Horn RN and probably H414. After that I'll load some RN's with RL15. I'll see how they shoot.

 

[Gatehouse]

I've had good luck wiht IMR 4350, H4350 RL 15 and RL 19

 

[kell2784]

Gatehouse, how many grns of H4350 are you using?

 

[Gatehouse]

Gatehouse, how many grns of H4350 are you using?

Depends on the bullet, but I find close to maximum charges usuallly produce best results.

 

[Noel]

I'm with Gatehouse. I tried 4064, WIN 760 too but IMR 4350 always gave the best velocity. My rifle wasn't picky and grouped most loads very well.

Speers max charge of 84gr(4350) for the 285gr and a WLRM primer will really blow your hair back.

I used the same powder for the 300gr Hornady RN and the best group I got was in .850".