10-15-2018, 12:23 PM
Stan:
No need to apologize to me about this. Shooting through cinder blocks or mild steel is something I can do now that I couldn't a year ago due to proximity to locations where it would be safe.
There is a rockwell hardness of 'mild steel' but that wouldn't be the problem. The problem would be cost for twelve each one foot square steel plates. I would make a box to secure three of them separated by five or six inches (yaw / pitch and bullet integrity as it penetrates) and would shoot one shot, inspect for penetration and photograph, then take 9 more shots sustained fire. Effects test with small arms ammo, particularly for automatic weapons, normally consists of a hundred or more rounds fired at a large target to see the effects of multiple hits. One hole through steel will weaken the steel so you have to shoot new steel with each cartridge. I imagine the steel alone would cost $500.00 so would have to ask the guys if they had any. Machinists and welders tend to have this stuff as scrap.
Cinder blocks are cheap and I would buy them myself. How they should be arrayed I don't know. Probably three or four deep. Shoot them to the right or left of that center support, inspect and photograph, then shoot 9 more shots sustained fire.
I am not really sure what anyone expects out of this. The targets would have to be close enough for the five minute Grendel ball so probably fifty yards. Too close for a realistic test because supporting fires would be over 100 yards in most cases. Anyway, the M-80 ball would absolutely dominate in penetration and sheer destruction because at that range, it hasn't lost a lot of velocity, its shape is basically a hybrid VLD, its jacket is very thick, and it is heavier than the other rounds. The M-855 with its steel tip would be next in penetration and destruction due to its velocity and steel tip. It will do what it was designed to do. Next I would give more than a 50% that the 6.8 would show more penetration and destruction than the Grendel ball, primarily due to its higher velocity.
Although interesting, enough of these types of tests have been done (better) that it is pretty obvious that a 2500 fps 6.5mm bullet that probably wasn't made for service use won't outperform bullets at much higher velocities that were made for service use.
And that higher velocity (6.8 ball) will outperform lower velocity (6.5 ball) given both bullets are constructed the same way with the same material.
What would be more interesting is jel tests but we have hunters here who have hunted with the Grendel ball I believe and probably the 6.8 ball. I doubt there is much difference in lethality on hogs and that is better evidence than shooting into jel for me.
LR55
No need to apologize to me about this. Shooting through cinder blocks or mild steel is something I can do now that I couldn't a year ago due to proximity to locations where it would be safe.
There is a rockwell hardness of 'mild steel' but that wouldn't be the problem. The problem would be cost for twelve each one foot square steel plates. I would make a box to secure three of them separated by five or six inches (yaw / pitch and bullet integrity as it penetrates) and would shoot one shot, inspect for penetration and photograph, then take 9 more shots sustained fire. Effects test with small arms ammo, particularly for automatic weapons, normally consists of a hundred or more rounds fired at a large target to see the effects of multiple hits. One hole through steel will weaken the steel so you have to shoot new steel with each cartridge. I imagine the steel alone would cost $500.00 so would have to ask the guys if they had any. Machinists and welders tend to have this stuff as scrap.
Cinder blocks are cheap and I would buy them myself. How they should be arrayed I don't know. Probably three or four deep. Shoot them to the right or left of that center support, inspect and photograph, then shoot 9 more shots sustained fire.
I am not really sure what anyone expects out of this. The targets would have to be close enough for the five minute Grendel ball so probably fifty yards. Too close for a realistic test because supporting fires would be over 100 yards in most cases. Anyway, the M-80 ball would absolutely dominate in penetration and sheer destruction because at that range, it hasn't lost a lot of velocity, its shape is basically a hybrid VLD, its jacket is very thick, and it is heavier than the other rounds. The M-855 with its steel tip would be next in penetration and destruction due to its velocity and steel tip. It will do what it was designed to do. Next I would give more than a 50% that the 6.8 would show more penetration and destruction than the Grendel ball, primarily due to its higher velocity.
Although interesting, enough of these types of tests have been done (better) that it is pretty obvious that a 2500 fps 6.5mm bullet that probably wasn't made for service use won't outperform bullets at much higher velocities that were made for service use.
And that higher velocity (6.8 ball) will outperform lower velocity (6.5 ball) given both bullets are constructed the same way with the same material.
What would be more interesting is jel tests but we have hunters here who have hunted with the Grendel ball I believe and probably the 6.8 ball. I doubt there is much difference in lethality on hogs and that is better evidence than shooting into jel for me.
LR55