130 gr. bullet push at top velocity give the same recoil has a 200 gr. bullet

[canuck4570]

on the JBM calculator I punched what the title says the 2 mentioned bullet at top velocity for a 308 winchester

and they give almost the same recoil velocity and energy very little difference

so when they say heavier bullet recoil more I am doutful, your opinion

200 gr. 12.8 velocity. and 18.5 energy
130 gr. 12.5 velocity and 17.8 energy

thank Canuck

 

[Snider shooter]

What’s to doubt? Your numbers prove the 200 gr has more recoil.

 

[canuck4570]

What’s to doubt? Your numbers prove the 200 gr has more recoil.

yes but the difference is so little I doubt the recoil difference will be felt

 

[4fifty8]

I'd use momentum to compare. For .308 Win -

(200gr x 2400 fps) / (130gr x 3000 fps) = 1.23

Probably gonna feel more kick with 200gr. Same comparison for my .300 Win Mag, 200gr feel more kick than 130gr at least from my rifle.

 

[Snider shooter]

Load up a few and try is the only way to test a theory. Real world experience trumps any computer simulations. My be no felt recoil difference. I don’t have much faith in computer predictions.

 

[canuck4570]

Load up a few and try is the only way to test a theory. Real world experience trumps any computer simulations. My be no felt recoil difference. I don’t have much faith in computer predictions.

will do. thanks will give feed back has soon has the weather gets better

 

[DaedalusX]

There’s absolutely a difference in felt recoil even between a 147gr and a 123gr in the 6.5 creed.

 

[4fifty8]

Ike Newton's 2nd Law of Motion do the calc's see if rifle gonna slam into your shoulder faster then probably expect more felt recoil.

 

[canuck4570]

Ike Newton's 2nd Law of Motion do the calc's see if rifle gonna slam into your shoulder faster then probably expect more felt recoil.

only .3 of velocity difference according to JBM

 

[boxhitch]

just proves JBM can only be used as a potential indicator, numbers are suggestive at best
just like the special formulas for calculating 'killing power'
nothing like real world experiences

 

[saskgunowner101]

only .3 of velocity difference according to JBM

What velocity did you use for the 130 grain bullet?
What velocity did you use for the 200 grain bullet?

 

[saskgunowner101]

So, I'm a bit confused here, seeing we can all talk and come to conclusions without seeing actual numbers...

I went to Hodgdon to get a ballpark max velocity for each bullet, and then shooterscalculator for the recoil etc

308 Win
130 grain bullet/3250 fps/45 grain powder charge (guess?, wasnt paying attention)/8 lb rifle

recoil impulse 2.88 lbs/second
recoil velocity 11.56 fps
recoil energy 16.62 foot lbs

308 Win
200 grain bullet/2600 fps/45 grain powder charge (guess? wasnt paying attention)/8 lb rifle

recoil impulse 3.31 lbs/second
recoil velocity 13.3 fps
recoil energy 22 ft lbs

Seems vastly different than what has been posted. Run the numbers yourself if you don't believe it.

 

[Mr.Rigpig]

What velocity did you use for the 130 grain bullet?
What velocity did you use for the 200 grain bullet?

Exactly,
Speed up the 130 enough and it will recoil more than the 200
Kinda an apples to oranges comparison.

 

[canuck4570]

Exactly,
Speed up the 130 enough and it will recoil more than the 200
Kinda an apples to oranges comparison.

for the 130 gr. 3300 fps
for the 200 gr. 2400 fps

 

[Hand Skills]

How did you settle on those numbers?

30" barrel for the 130's? 18" barrel for the 200's?

 

[track]

An apple/orange comparison and results are the same? In my experience they were always opposites. I've tested that theory with many different cartridges, the heavier bullet always had much more recoil than the ligher; recently the 30-06 and the 9.3x74R. I'm dubious of your findings.

 

[canuck4570]

How did you settle on those numbers?

30" barrel for the 130's? 18" barrel for the 200's?

I used Nosler, Hugdon, IMR to get a average

 

[saskgunowner101]

An apple/orange comparison and results are the same? In my experience they were always opposites. I've tested that theory with many different cartridges, the heavier bullet always had much more recoil than the ligher; recently the 30-06 and the 9.3x74R. I'm dubious of your findings.

I agree, see post #12

 

[Mr.Rigpig]

With similar velocity the heavier bullet will always have more recoil.
You can play with velocity though and get any answer you want. (I can make a 300gr bullet kick the crap out of a guy from a 45-70, and I can load a 500gr bullet in the same cartridge that will barely make the rifle move.... Different velocity, obviously)

 

[canuck4570]

With similar velocity the heavier bullet will always have more recoil.
You can play with velocity though and get any answer you want. (I can make a 300gr bullet kick the crap out of a guy from a 45-70, and I can load a 500gr bullet in the same cartridge that will barely make the rifle move.... Different velocity, obviously)

you got it
top velocity with 200 gr in 308 winchester is around 2400 fps and top for 130 gr. is 3300
so in the same rifle you get almost identical recoil according to JBM will try and see soon and give feed back