working up a .338 LM load

[misfits]

ok so i have been workin up my load at 300yards now i don't know if i should be working it up at 100 yards? but so far no great loads i started 2 grains above min. using reloader 25 88gr 89gr and now 90gr at 300yrds 90 grains is spitting them everywhere so i guess its time to climb back down the ladder. what are your thoughts?

 

[mmattockx]

I can't help on the actual loads, but testing at 300yds will show subtle differences far better than at 100yds. Once you get some nodes located, I would suggest fine tuning at even longer ranges if they are available. Nothing will show vertical dispersion like a longer range.

Mark

 

[Westside]

whats the barrel length ?
whats the twist ?
bullet weight / type and manuf. ?
primer ?
oal of cartridge ?
how far is the jump to the lands ?

I am throwing everything from 210 gr to 300 gr.
Nosler/Barnes/Sierra for Manufacturers
Ranges from 100 to 1200 yards
Accuracy has been pretty consistent (2 moa) out to 400 yards when considering the human pulling the trigger.
I have been quite happy with H1000 for powder and am currently using up my stock of CCI and federal large rifle mag primers.
Rifle #1 has 1:9.4 twist 27" barrel
Rifle #2 has 1:9.4 twist 30" barrel

 

[misfits]

26 inch barrel rate of twist is 1:9 using 250 seirra match hpbt bullets primers are winchester L R MAG oal is 3.640-3.650 the best so far has been 89grains i have a few rounds with 90 grains in them then i'm gonna try 88.5 and 89 and see o the fun of workin up a load