Fascinating discourse on the Bekker Knock Out Value at this website:
http://www.sportingrifles.com/knock_out_value.htm
What I find fascinating is the high BKOV scores for some cartridges most people don't get fascinated about. We Americans tend to drool all over velocity and energy figures. Maybe we are missing something. We tend to forget that higher (momentum) x (sectional density) equates to a deep penetrating, butt-kicking round.
As a baseline, the BKOV for a 30-06, 150 grain, 2910 fps cartridge is 14.1
The 6.5x55 Swede, 140 grainer, plodding along at 2550 fps scores a BKOV of 14.6!
My 7x57 Mauser, 175 grainer at 2440 fps scores a BKOV of 18.9. A 30-06, 180 grainer, clocking at 2700 fps scores an 18.8.
Again, the 7mm's high sectional density and good momentum carries the day.
The Swede's strength lies in its momentum and extremely high sectional density.
No wonder the Swede kills big critters -- it drives deep.
The 140 grain factory load in the new 260 Remington, moving out at 2750 fps, scores a BKOV of 15.8. Pretty impressive.
I really like the 220 grainer in the 30-06 though -- with a muzzle velocity of 2410 fps this combination scores a BKOV of 25.1.
For comparison purposes, a 375H&H 300 grainer at 2400 fps scores a BKOV of 31.3
So what does this mean to me? It means I don't have to beat myself to death with high velocity heavy recoiling cartridges. I just need to get in a little closer and make a well-placed shot. Well duh! No revelation here, I guess!
Sure makes me appreciate the fact that a good bullet, with high sectional density, impacting on the prey at say anywhere between 2200-2600 fps will kill cleanly and not damage a lot of meat.
Well, time to go get my checkbook and go find a 260 Remington! Then again, that 220 grainer in the 30-06 sounds like the perfect grizzly medicine for you Western hunters. I am afraid there ain't much in the Virginia deer woods begging for a 220 grain 30-06 round...
http://www.sportingrifles.com/knock_out_value.htm
What I find fascinating is the high BKOV scores for some cartridges most people don't get fascinated about. We Americans tend to drool all over velocity and energy figures. Maybe we are missing something. We tend to forget that higher (momentum) x (sectional density) equates to a deep penetrating, butt-kicking round.
As a baseline, the BKOV for a 30-06, 150 grain, 2910 fps cartridge is 14.1
The 6.5x55 Swede, 140 grainer, plodding along at 2550 fps scores a BKOV of 14.6!
My 7x57 Mauser, 175 grainer at 2440 fps scores a BKOV of 18.9. A 30-06, 180 grainer, clocking at 2700 fps scores an 18.8.
Again, the 7mm's high sectional density and good momentum carries the day.
The Swede's strength lies in its momentum and extremely high sectional density.
No wonder the Swede kills big critters -- it drives deep.
The 140 grain factory load in the new 260 Remington, moving out at 2750 fps, scores a BKOV of 15.8. Pretty impressive.
I really like the 220 grainer in the 30-06 though -- with a muzzle velocity of 2410 fps this combination scores a BKOV of 25.1.
For comparison purposes, a 375H&H 300 grainer at 2400 fps scores a BKOV of 31.3
So what does this mean to me? It means I don't have to beat myself to death with high velocity heavy recoiling cartridges. I just need to get in a little closer and make a well-placed shot. Well duh! No revelation here, I guess!
Sure makes me appreciate the fact that a good bullet, with high sectional density, impacting on the prey at say anywhere between 2200-2600 fps will kill cleanly and not damage a lot of meat.
Well, time to go get my checkbook and go find a 260 Remington! Then again, that 220 grainer in the 30-06 sounds like the perfect grizzly medicine for you Western hunters. I am afraid there ain't much in the Virginia deer woods begging for a 220 grain 30-06 round...
