nobody_special
member
More newbie questions...
I purchased a bunch of CCI 34 primers, since they're specifically made to reduce the chance of slam-fire in an autoloader. I'll be loading for my M1A. Also, as recommended, I got a jug of IMR 4895. I haven't purchased bullets yet. (Or the press, but that's just a matter of time and when it'll be in stock at a good price.)
For .308 using IMR4895, the Speer #13 manual shows a loading of 41.0 gr. (start) to 45.0 gr. (maximum)... but that isn't with a magnum primer. I read that one should reduce the load by 10% when using a magnum primer.
Here's the problem: the permissible range of powder weight only has 10% variation. If I were to work up a load from the 41.0 gr. minimum, and the magnum primer is equivalent to a ~10% increase in powder, then I'd be starting near maximum pressure. But they also warn not to go below the minimum pressure. What to do?
I have another question: is it tricky to substitute surplus pulled 30-06 M2 ball bullets when loading .308 cartridges? I know there could be a concern with case volume, but the bullet weights are similar. I don't know if the lengths are similar, or how much of an error in OAL might be permissible when working up a load.
I could pull a bullet from my Indian ('74-'75 OFV) "M80 ball" (which may or may not really be M80, as I think it was advertised as having a 150 gr. bullet while M80 should be 146 gr) and calculate how far back the bullet sits in the case, but that still doesn't account for variation in powder type and weight.
As an interesting (but short ranged) alternative, I can get cheap .30 carbine surplus bullets, and the Speer manual has loading data for them (though with Speer .30 carbine bullets, and it's probably not safe to assume they are identical to surplus).
I was also going to get some Hornady A-max 168gr. bullets for longer range or more precise shooting, but maybe I'll hold off since the Speer manual only has data for Speer bullets. :banghead: Do I have to get a different manual for every manufacturer's bullets?
The Speer manual has a section (pg. 78) about seating bullets just behind the rifling. I found that odd, as I thought the OAL needed to be fixed in order to get the proper peak pressure.
Can someone shed some light on my confusion?
Thanks...
I purchased a bunch of CCI 34 primers, since they're specifically made to reduce the chance of slam-fire in an autoloader. I'll be loading for my M1A. Also, as recommended, I got a jug of IMR 4895. I haven't purchased bullets yet. (Or the press, but that's just a matter of time and when it'll be in stock at a good price.)
For .308 using IMR4895, the Speer #13 manual shows a loading of 41.0 gr. (start) to 45.0 gr. (maximum)... but that isn't with a magnum primer. I read that one should reduce the load by 10% when using a magnum primer.
Here's the problem: the permissible range of powder weight only has 10% variation. If I were to work up a load from the 41.0 gr. minimum, and the magnum primer is equivalent to a ~10% increase in powder, then I'd be starting near maximum pressure. But they also warn not to go below the minimum pressure. What to do?
I have another question: is it tricky to substitute surplus pulled 30-06 M2 ball bullets when loading .308 cartridges? I know there could be a concern with case volume, but the bullet weights are similar. I don't know if the lengths are similar, or how much of an error in OAL might be permissible when working up a load.
I could pull a bullet from my Indian ('74-'75 OFV) "M80 ball" (which may or may not really be M80, as I think it was advertised as having a 150 gr. bullet while M80 should be 146 gr) and calculate how far back the bullet sits in the case, but that still doesn't account for variation in powder type and weight.
As an interesting (but short ranged) alternative, I can get cheap .30 carbine surplus bullets, and the Speer manual has loading data for them (though with Speer .30 carbine bullets, and it's probably not safe to assume they are identical to surplus).
I was also going to get some Hornady A-max 168gr. bullets for longer range or more precise shooting, but maybe I'll hold off since the Speer manual only has data for Speer bullets. :banghead: Do I have to get a different manual for every manufacturer's bullets?
The Speer manual has a section (pg. 78) about seating bullets just behind the rifling. I found that odd, as I thought the OAL needed to be fixed in order to get the proper peak pressure.
Can someone shed some light on my confusion?
Thanks...