Need Load Data for 375 Winchester using 280gr Lyman Boolit

[264 Win Mag]

I am looking to start working up loads for my 375 Winchester and have two cast boolits I am trying out first. I have plenty of data for the 235gr RD but have been searching for data for the 280gr Lyman. The powders I have on hand are H335, H4227, H4895, and Trail Boss.
Anyone using this boolit with any of these powders? Thanks,

Thomas

[mainiac]

out of the 3,i would say youd have best luck with h-4227. the 4895 wont work(i dont think),cause youll run out of case capicity before you ever get any speed.

I use V-133,and RE7 in my 375,,,with the 375449 boolit. Extremely accurate boolit!

Dont know if there is any data for 4227 in the 375???

[264 Win Mag]

Lyman's 49th shows the 375449 as weighing 264grs loaded with 21.0 - 24.8 of IMR4227. IMR4227 and H4227 are very close on the burn rate charts so I think a starting load of H4227 is where I will begin. Be interesting to see what I can do with iron sights at 50 yards to a bowling pin. :-D

Thomas

[mainiac]

my 449,s weigh alot more then that,probaly cause i use ww,or 50/50 ww-pure as my alloy.

I think my 375 is the most accurate lever gun i ever shot.It will shoot ragged hole groups@ 50 yards with peep sight.I dont enjoy shooting it though,cause it kicks pretty friggin hard. The harder you push thatboolit,the tighter it shoots. Im around 2000 f.p.s. with v-133,,shoots tremendous.

BTW, i think mine weigh 284 grs,lubed and checked.....

[TXGunNut]

My .375 is going to see it's first boolit tomorrow, a 375449 ACWW propelled by RX7. I'm thinking H335 would be worth a look but have no firsthand experience with it.