Thread: Knockdown power

FFS this was done to death...50-60-70 years ago....think it was Matt Grant who set up a wooded box on stand with pencil attached to scribe on paper when box moved...shot box..pencil moved...put but plate on box,fired shot...pencil moved....threw cricket ball at box...and it moved the most of all.

in theory a 110grn hp from 30/06 delivers more energy than a 180 grn...but delivery in a 1" deep dinnerplate sized crater doesnt kill well.....a 1" wide 12" deep hole kills very well.

Originally Posted by Micky Duck

FFS this was done to death...50-60-70 years ago....think it was Matt Grant who set up a wooded box on stand with pencil attached to scribe on paper when box moved...shot box..pencil moved...put but plate on box,fired shot...pencil moved....threw cricket ball at box...and it moved the most of all.

in theory a 110grn hp from 30/06 delivers more energy than a 180 grn...but delivery in a 1" deep dinnerplate sized crater doesnt kill well.....a 1" wide 12" deep hole kills very well.

the difference there how much resistance there is to the projectile. If the bullet can deliver all the energy then it would move the box a lot.
Ultimately though if you fire the gun and cant knock you over then the bullet cant either. Equal and opposite reactions and all that

Originally Posted by csmiffy

the difference there how much resistance there is to the projectile. If the bullet can deliver all the energy then it would move the box a lot.

I was shooting at an empty coke can with the air rifle yesterday. Even with no weight in it the can never moved, the pellets punched straight through front and back

Originally Posted by Cigar

I was shooting at an empty coke can with the air rifle yesterday. Even with no weight in it the can never moved, the pellets punched straight through front and back

use flat points VS pointy ones and the difference is HUGE in air rifle.

Originally Posted by Micky Duck

use flat points VS pointy ones and the difference is HUGE in air rifle.

These were standard Winchester blunt pellets.
About 25 years ago I compared standard pellets (CAC maybe?) to the Daisy pointed hunting pellets over the chronograph, the hunting pellets were heaps slower. I reckon the "skirt" was too small and they didn't seal properly.

Originally Posted by Micky Duck

use flat points VS pointy ones and the difference is HUGE in air rifle.

Never had any luck with pointy pellets in my years doing field target air rifle shooting. Nobody in that game used them at all.
Its all JSBs or RWS barracoutas.

Originally Posted by Micky Duck

FFS this was done to death...50-60-70 years ago....think it was Matt Grant who set up a wooded box on stand with pencil attached to scribe on paper when box moved...shot box..pencil moved...put but plate on box,fired shot...pencil moved....threw cricket ball at box...and it moved the most of all.

in theory a 110grn hp from 30/06 delivers more energy than a 180 grn...but delivery in a 1" deep dinnerplate sized crater doesnt kill well.....a 1" wide 12" deep hole kills very well.

Greetings Micky and all,
From Matt's text it was 1947. The article was reprinted in "The Sharp Shooter" in 1972. Everyone should read it.
Regards Grandpamac.

Originally Posted by Micky Duck

FFS this was done to death...50-60-70 years ago....think it was Matt Grant who set up a wooded box on stand with pencil attached to scribe on paper when box moved...shot box..pencil moved...put but plate on box,fired shot...pencil moved....threw cricket ball at box...and it moved the most of all.

in theory a 110grn hp from 30/06 delivers more energy than a 180 grn...but delivery in a 1" deep dinnerplate sized crater doesnt kill well.....a 1" wide 12" deep hole kills very well.

And it's still going