Thread: New rifle, scope question

Originally Posted by gadgetman

I'm talking exactly the same info as Tim. He just used Einstein's energy equation for particles travelling at the speed of light which is double what we expect normally and leads on to the theory of relativity. Yes, I'm a geek that has done post graduate level physics.

Still no. This was what I was referring to.

If he wants lighter recoil then choosing between identical models of 308 vs 7mm08 (say a T3) then the weight difference between the rifles is negligible, and the energy of the bullet at the muzzle is close enough to identical between the calibres, thus there is almost no difference in recoil between the two

Originally Posted by Gibo

Still no. This was what I was referring to.

If he wants lighter recoil then choosing between identical models of 308 vs 7mm08 (say a T3) then the weight difference between the rifles is negligible, and the energy of the bullet at the muzzle is close enough to identical between the calibres, thus there is almost no difference in recoil between the two

Isn't that what they were saying? That's what I read at least.

Originally Posted by Nibblet

Isn't that what they were saying? That's what I read at least.

Dunno, I wasn't listening, I'm just being a c unit

Originally Posted by Gibo

Dunno, I wasn't listening, I'm just being a c unit

Hope you're wearing your witches hat if all you're doing is stirring the pot

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Thanks guys, im sure this physics class you have put me through will help me kill way more deer, much appreciated!

Originally Posted by TheJanitar

Thanks guys, im sure this physics class you have put me through will help me kill way more deer, much appreciated!

Just don't go taking a lever action with open sights to a Tahr fight

Originally Posted by Gibo

Just don't go taking a lever action with open sights to a Tahr fight

Bro not the levers fault. Was user error.
Was first time using new range finder with angle adjusted range.
Saw 135m? On rangefinder so subtracted distance for downhill shot like an idiot.

hmmm lets hear the story please ?

Originally Posted by Gibo

Still no. This was what I was referring to.

If he wants lighter recoil then choosing between identical models of 308 vs 7mm08 (say a T3) then the weight difference between the rifles is negligible, and the energy of the bullet at the muzzle is close enough to identical between the calibres, thus there is almost no difference in recoil between the two

Look at Core-lokt and the usual packet velocities.

308, 150gr, 2820f/s - mxv = 423k units of momentum

708m, 140gr, 2860f/s - mxv = 400k units of momentum

So about 5% difference = bugger all.

223, 55gr, 3240f/s - mxv = 178k units of momentum

Less than half.

Originally Posted by TheJanitar

hmmm lets hear the story please ?

I don't think you've missed anything.

Originally Posted by gadgetman

Look at Core-lokt and the usual packet velocities.

308, 150gr, 2820f/s - mxv = 423k units of momentum

708m, 140gr, 2860f/s - mxv = 400k units of momentum

So about 5% difference = bugger all.

223, 55gr, 3240f/s - mxv = 178k units of momentum

Less than half.

I think my point was, my 308 can have quite varying kick depending how I load it, this is from the same weight rifle.

Originally Posted by TheJanitar

hmmm lets hear the story please ?

It's in the magazine sub forum.

End result is me shooting the ground in front of a tahr

Originally Posted by Gibo

I think my point was, my 308 can have quite varying kick depending how I load it, this is from the same weight rifle.

Same deal, just throw in your actual numbers.

Originally Posted by Nibblet

It's in the magazine sub forum.

End result is me shooting the ground in front of a tahr
Attachment 69055

That same tahr in the picture? mate, probably could have killed that with a slingshot

Originally Posted by TheJanitar

That same tahr in the picture? mate, probably could have killed that with a slingshot

That one is photo shopped for example purposes