unburnt powder

[rasbo]

one guy I hunt with says anything over 70 grains powder,wont burn. I use 100 grains powder its always burnt up.I know that answers my own ? what say you

[CP]

Once you hit a certain point, most of the extra powder is burnt in the air just outside the muzzle adding only to the smoke cloud.  There are a lot of factors that determine that ‘certain point” e.g. primer, powder, gas seal, projectile weight, etc. 

I don’t think anyone can pinpoint the specific point at which this happens for all rifles, all loads.  Could be 70 for one load, 150 for another.

 

[luvtohnt]

Anytime you see flame out the end of your barrel it means there is still powder to be burnt. The longer the flame the more excess powder there is left. Once the powder is out of the barrel it does no good for your projectile. But I look at it as I want the absolute highest speed on my bullet for better ballistics so a slight flame means the bullet was being propelled all the way down the barrel. If you don't have a flame then you don't really know where in the barrel the powder stops burning, and may loose alot of speed. Shotting large bores with heavy projectiles one needs the best ballistics possible for accuracy. I think it also depends on the length of barrel as far as how much powder you can burn. I shoot 120 gr. of BP substitue and get about a 3 inch flame out the end of my barrel, but with 110 gr I get no flame. This is also helpful when choosing which side of the mountains to hunt cause you don't want to start a fire.

Brandon

[wastickslinger]

I also found that the magnum (28" barrel), 100 grains insnt quite enough and 150 was too much. I now use 4-30 grain pellets= 120 grains of powder. Works great.