BBerguson
Official Pennsyltuckian
Here’s the information…
Cartridge: 308 Win
Bullet - NOE 225gr cast with gas check. No grease grooves and it’s a spitzer. I’m sure it has a decent BC.
Powder I’d like to try but have no data: IMR Enduron 8133
There is load data for a lot of cartridges but not 308 for this very slow powder. One I pulled off is for 243 win with a 115 gr bullet, a very heavy bullet for this caliber. Starting load of 42.2 grs, Max is 48. 107gr bullet starting load is 45.3. 6.5 PRc with153gr starting load 52gr. All of the load data is for heavy for caliber bullets.
I know from loading 3031 in 45-70 that if the powder weight is too low the powder won’t ignite properly and I’ve watched the bullet come out of the muzzle. Even chronographed one at 113.5 fps!
Things I “think” I know…. Slow powder has a more forgiving pressure curve. Slow powder requires a full case for proper ignition. I think it’s harder to blow up a gun with slow powder, fast pistol powder is easy, slow powder, not so much. But, I’ve been playing with straight walled cartridges and they are more forgiving than shoulder cartridges. Rifle bullets seem to be more accurate with a slower starting push. That’s about it.
I’m not sure I could get enough powder in the case to cause problems. Win 296 in 44 magnum as an example.
The load I’m shooting now is 18gr of IMR 4227. No velocity readings yet. It’s shooting around an 1” at 50 yards and I’d like it to do better as I want to hunt deer with this and would like to think it could be a 200yd deer killer. With that said, I want more velocity for that range and I suspect I’m around 1400 fps. Cloudy this coming week so maybe I’ll chrony it on Tuesday So I’m not just guessing At velocity.
I’m going to email Hodgdon but not sure if they’ll commit to an answer.
Ok, now your thoughts! Have you ever developed a load from “scratch”? I know we all have but with this one I have so little information to go by and what I have is with other cartridges and bullet weights.
BB
Cartridge: 308 Win
Bullet - NOE 225gr cast with gas check. No grease grooves and it’s a spitzer. I’m sure it has a decent BC.
Powder I’d like to try but have no data: IMR Enduron 8133
There is load data for a lot of cartridges but not 308 for this very slow powder. One I pulled off is for 243 win with a 115 gr bullet, a very heavy bullet for this caliber. Starting load of 42.2 grs, Max is 48. 107gr bullet starting load is 45.3. 6.5 PRc with153gr starting load 52gr. All of the load data is for heavy for caliber bullets.
I know from loading 3031 in 45-70 that if the powder weight is too low the powder won’t ignite properly and I’ve watched the bullet come out of the muzzle. Even chronographed one at 113.5 fps!
Things I “think” I know…. Slow powder has a more forgiving pressure curve. Slow powder requires a full case for proper ignition. I think it’s harder to blow up a gun with slow powder, fast pistol powder is easy, slow powder, not so much. But, I’ve been playing with straight walled cartridges and they are more forgiving than shoulder cartridges. Rifle bullets seem to be more accurate with a slower starting push. That’s about it.
I’m not sure I could get enough powder in the case to cause problems. Win 296 in 44 magnum as an example.
The load I’m shooting now is 18gr of IMR 4227. No velocity readings yet. It’s shooting around an 1” at 50 yards and I’d like it to do better as I want to hunt deer with this and would like to think it could be a 200yd deer killer. With that said, I want more velocity for that range and I suspect I’m around 1400 fps. Cloudy this coming week so maybe I’ll chrony it on Tuesday So I’m not just guessing At velocity.
I’m going to email Hodgdon but not sure if they’ll commit to an answer.
Ok, now your thoughts! Have you ever developed a load from “scratch”? I know we all have but with this one I have so little information to go by and what I have is with other cartridges and bullet weights.
BB