recoil calculator 416 vs 460

icehunter121

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was playing with a recoil calculator and comparing 2 rifles i have,a 416 rigby and a 460 wby..
416 460

bullet weight in grains 400 405
velocity in fps 2400 2600
powder charge in grains 104 115
weight of gun (lbs) 10 12

results

recoil impulse in(lbs.sec) 6.10 6.71
velocity of recoiling gun(fps) 19.66 18.01
free recoil energy in (ft/lbs) 60.00 60.45

The 416 does not have a brake or anything,the 460 is a number 1 i picked up from the ee forum and is braked,ported and weighted down.
The 416 has more of a classic stock but now here are some questions to ponder.

The 416 off the bench is absolutely BRUTAL to shoot. I fired 2 rounds in a t-shirt and quit,grizz axxemann fired 1 round offhand and took the scope to the head:D

The 460 off the bench i used a recoil shield over my t-shirt and no other padding.Muzzle rise was probably about 12 to 14 inches and it might have moved me back about 18 inches or so.Dont qoute me on this cause i am just going by what i felt and dont have any actual video. The 416 probably moved me back about 24 inches and this was a straight back severe jolt..and i mean severe.muzzle rise i think was about 8 to 10 inches or so but the recoil velocity was a real eye opener.In short it was so severe i quit after 2 shots.

Does the recoil shield make that much of a difference,does the brake and porting slow down the recoil impulse that much or does the rigby just have a inferior stock design for a heavy recoiling rifle??

I wish i had video of both as it would be quite interesting to watch. One other thing when i fired the 416 off the bench the recoil jammed the scope and my shooting glasses back into my forehead and broke open a cut from my .458 i got earlier in the morning.

The 460 off the bench never even come close to doing this.

Any thoughts or ideas???....or if some one wants to try out both rifles i would supply them as well as ammo but you gotta sign a waiver first..:D :dancingbanana:

p.s. the first set of numbers is the 416 and the second set is the 460,i had it set up on here how i wanted it but for some reason the system changed it all.....Ice
 
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A brake makes a HUGE difference. The BMG guys know this ;)

A without a bullet in front of it, powder gas moves 5000-7000 fps. 110 grains of mass (powder) moving at those speeds contributes SIGNIFICANTLY to recoil. You can redirect that recoil by redirecting the expanding gas, either omni-directionally through a brake, or vertically (to control the muzzle jump) through magna-porting style vents.

Try to see how much of a difference a brake makes in your calculator by reducing the amount of powder. If we assume the brake is 100% efficient at redirecting the powder gas, then the only recoil left is from the bullet itself. Therefore, put '0' in as the powder charge. Most brakes are in the 50-80% efficiency range.

So really, compensated numbers for the .460 with an 80% efficient brake come out to more like 14fps and 38fpe recoil energy to deal with. Which is a lot more like my 8.5lb 45-70 shooting that same bullet at 2000 fps. Which seems about right to me, just going by (purely subjective) 'feel'
 
You don't say what make your .416 is, but my #1 had none of the recoil issues you seem to have experienced. I did change the quarter rib to one which allowed me to mount the scope in line with the front of the falling block. If you are scared of being hit with the scope, chances are you will be holding the rifle in such as way that the felt recoil will be more severe.
 
Boomer said:
You don't say what make your .416 is, but my #1 had none of the recoil issues you seem to have experienced. I did change the quarter rib to one which allowed me to mount the scope in line with the front of the falling block. If you are scared of being hit with the scope, chances are you will be holding the rifle in such as way that the felt recoil will be more severe.

The 460 is a ruger #1 and the 416 is custom built on a enfield action. I have weighted the rifle down with lead to 10 lbs but it still fierce to shoot.I have no idea who built the rifle but i am thinking a different stock design or heavier piece of wood just might be the answer as well as a muzzle brake.:)
 
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