PBR QUESTION- BULLETS VS POWDER

[english setter]

why cant u use a lot more pyro to fire a much lighter projectile like a PBR vs a conical in a 50 cal kentucky? I notitice charts that use SAME powder charge (100 gr) w 177 gr PBR and 385 gr conical. how is it possible to fire a projectile twice as heavy w same powder charge? wouldnt that produce excessive pressure especially since more surface area contacts lands w conical vs PBR?

I reload rifle and shotgun and u must reduce either the powder or the bullet. therefore cant u use lot more powder w tiny PBR to provide flatter trajectory and somewhat longer range.I know-poor BC andI'm not that concerned w accuracy now- just want to see gun's range capability thanks!

[frontier gander]

in my deer creek manual it says to always reduce loads by 20% when changing over to a conical for the first time. More mass means more pressure in the barrel.

[cayugad]

While you can shoot similar powder charges, you have to remember.. the accuracy might suffer and so might the shooter. Some of the recoil people are willing to endure, amazes me. When I shoot large conicals, I normally start them out around 65 grains and work up from there. If I hit 90 grains, that is really pushing one IMO. Shoot the powder charge that is most accurate and do not worry about the other guy. Just never exceed the recommended powder levels put forth by the manufacturer of the rifle of the powder maker.

[yeoman]

setter - because the formula for barrel pressures is not linear. You might have asked the same question this way. If they recommend 100 grains with 385gr conical, why don't they recommend twice as much for the 177 PRB which weighs half the amount? Because the weight of the projectile isof lesser importancein barrel pressure than is the raw powder charge. Doubling the weight of the projectile is nothing like doubling the powder charge. It might be possible to put enough powder in a barrel to blow it up with no projectile at all. Stick with the manufacturers recommendations for maximum charge and maximum projectile weight.

Good question. Keep them coming.