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But Where's the Kick?

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Zonie

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This is for all of you people who are just getting interested in Muzzle Loading.
Some of you are somewhat amazed that we muzzleloaders shoot .50, .54, .58, .62 and even .75 caliber bullets without needing a sling for our arm for the rest of the week.

Some of you think the reason is because those old blackpowder guns don't have enough power to even get the bullet/ball down range, let alone kick hard. This of course is not true.

The fact is our muzzleloading guns do kick, however, it is the WAY they kick that is different from a modern smokeless firearms.

IMO because pressure determines the speed at which Smokeless powder burns and in burning it builds up its pressure very fast, it burns very fast. The pressure goes from zero to its peak in an extremely short period of time. This very high pressure drives the bullet at a very high INITIAL rate of acceleration.
Physics being what it is, the rifle also accelerates into your shoulder at an equally high INITIAL rate of acceleration which gives it its' characteristic fast slap or kick to your shoulder. That SLAP can raise bruises and take the fun out of sending a lot of bullets down-range.

Black Powder is an explosive but its burning rate is slower than most smokeless powders. Because it burns at a slower but at a more uniform rate than smokeless powder, it accelerates the bullet in a more uniform manner.
The net result of all of this is the velocity or energy of the bullet/ball may be the same with either powder but the Black Powder gun feels more like a mighty push or shove rather than a slap or kick.

Don't get me wrong, shooting a 400 or 500 grain bullet loaded over a charge of black powder will give a "kick" that is hard to forget but here again, it doesn't feel like the kick from smokeless powder pushing the same bullet to the same speed.

The bottom like is: do not be intimidated by the caliber and don't think for an instant that black powder guns don't have any power.
Their just a lot easier on your shoulder which makes them more fun to shoot a lot.
:)
 
Good post Jim, another factor is trhe style of gun my early Virginia smoothrifle is very mild on the shoulder with 90+ gr of 3f, it has a wide heavy stock and is a relatively heavy gun, if one took a Blue Ridge style gun in .62 with the same load it would probably leave a bruise.
 
I agree with TG, as with all firearms, the heavier the weapon, the less the "felt" recoil will be with like charges...

A .75 caliber with a 42 inch barrel will kick less than a .75 caliber with a 30 inch barrel using the same load in each, the extra weight make a difference in the recoil...

IMO, the style of the butt plate causes more pain than the recoil...
 
I agree, the weight of the gun has a lot to do with the Felt recoil but what I was getting at is the way the powder burns and creates gas pressure influences the way a gun will seem to kick. I am assuming the same stock shape, bullet weight and total gun weight. Using this as a base to go from, there is a notable difference in the way the kick is felt.

If the pressure goes to 20000 PSI in .0005 seconds (not a real value but given to illistrate the example) it will exert that pressure on the bullet (forward) and the rifle (backward) causing them both to accelerate almost instantly.

If the pressure goes to 20000 PSI in .0030 seconds it will accelerate the bullet (and the rifle) more gently.

Both bullets will be going approximently the same speed by the time they reach the muzzle of the barrel.

Think of it like two cars, each traveling 20 miles an hour. One car stops in .05 seconds (from hitting a wall) and the other car stops in 2 seconds (panic stop with the brakes). The effects on the passengers will be quite different.

Although comparing the bullet/powder and the car/brakes seem to have nothing in common, the laws of physics and the way the forces involved effect other things are exactly the same. It is only a matter of degree.
 
Not being one to let a new product slip by without trying it I shot some triple Se7en powder and I 'll tell you what...that stuff kicks!
I thought I just pulled the trigger on a .375 H&H!
The burn of Triple Se7en is much faster than BP and the pressures are much higher.
I don't like the stuff.
Shooting Pyrodex (the only thing I can get my hands on) is the way I will go...until I get some BP in hand.

Huntin
 

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