Thread: Powder for 303 150's

by low pressure signs you mean????
303 has a few tricks to reloading....loose chambers and possibly headspace mean you want to allow brass to stretch and keep it as big as you can,eg just size neck to make brass last...that SHOULD ALSO HELP with pressure signs.... 748 should be great as its fine in 308 and realisticly the two arent much different....there is a trick with wee oring,like what folks use on denture braces to keep cases in place for first fireing.also try 180 grn projectiles as some 303s prefer the heavier/longer projectile, Robert has cast ones that work well too....might be better and definately cheaper option for you.

Thanks Mickey Duck. I do know about only neck sizing 303 which I do and loose chambers and head space In 303's, mines at quite excessive but had it checked and still safe to shoot. I know about the o'ring trick just never tried it, probably a good idea to do so next time I go out shooting. As for low pressure signs I'm seeing pushed out primers and excessive soot around the necks. With some 748 loads I've been getting a both push out primers and sticky bolt on extraction, over pressure? 180g jacketed boolits without hurting the wallet are hard to find. I have bought and used Roberts 210g's with good results, 28gn of 2208 and 10gn of trailboss with a WLR primer give me .75 to 1" groups at 50m. Weird thing is I get no pushed out primers with 28gn of 2208 but between 28-32gn primers are pushed out, more than 10gn of trailboss pushes out primers aswell?

Originally Posted by Three O'Three

Thanks Mickey Duck. I do know about only neck sizing 303 which I do and loose chambers and head space In 303's, mines at quite excessive but had it checked and still safe to shoot. I know about the o'ring trick just never tried it, probably a good idea to do so next time I go out shooting. As for low pressure signs I'm seeing pushed out primers and excessive soot around the necks. With some 748 loads I've been getting a both push out primers and sticky bolt on extraction, over pressure? 180g jacketed boolits without hurting the wallet are hard to find. I have bought and used Roberts 210g's with good results, 28gn of 2208 and 10gn of trailboss with a WLR primer give me .75 to 1" groups at 50m. Weird thing is I get no pushed out primers with 28gn of 2208 but between 28-32gn primers are pushed out, more than 10gn of trailboss pushes out primers aswell?

Photos.

I dont understand what you are meaning buy pushing out primers? This can basicly only happen from excessive headspace.