Lehigh 40x215 in a Slow Twist - NOT SO GOOD Today
Jul 9, 2015 14:38:25 GMT -5
Post by sabotloader on Jul 9, 2015 14:38:25 GMT -5
Gosh I hate being wrong! but after todays testing and the test shooting Grouse did yesterday - I am backing off my hopes that this single bullet could be what I would have called a 'Universal Bullet for all" Shooting this bullet in a SLOW TWIST is not going to be as good as shooting it in a FAST TWIST barrel.
This morning I ran to the farm and posted a target up at 180 yards. The Garbanzo Beans were just to tall and at 200 they obscured the target.
I was shooting the same 45 Knight DISC Extreme and I also took my 50 Ultra-Lite as another testing tool. I took 5 shoots on target with the 45 and two with the Ultra-Lite. And again I was shooting 110 gr. of T7-2f. The grouping certainly were not the best and at 180 yards I was definitely showing some yawing was occurring.
There are a couple of possible problems, other than the twist rate. In the 1-30 that bullet will need every bit of twist it can get. It needs to make every turn. In that thought - if the bullet slips in the sabot at all or skips some lands going up the barrel it will not get the rotation it needs. Remember mathematics already says it con not be shot from a slow twist, and if there is any slippage at all there is no chance. The MMP sabot seems to fit the bullet a little tighter than does the Harvester and the MMP seems a little tighter going down the barrel. Then I am not helping my cause with the barrel heat that is existing.
Here is the target as shot.
The first group was fired one shot right after the next. The second group of two were shot with some cooling time between shots. Then I switched to the 50 Ultra-Lite using the same 110 grain load and a MMP 40x50 Blue sabot. Even on a cool barrel that loader easier than I wanted it to, but I was loaded so I shot it and then decided one more shot just for the heck of it. I can not say I was pleased with any of the shots or the groups but it was something I felt I needed to know.
When I walked back out to the target and looked at the holes I felt there was some yawing showing on all of the paper hole. Removing the target from the plywood verified that thought. Then as a better indication of what was happening I plugged some bullets in the holes and it became really obvious in most of the wholes... All of this a created another "I wonder" I wonder what is drooping the nose of the bullet or the tail of the bullet when it hits the target.
Upping the charge to my normal 120 grain load or even higher would probably fix the problem - but even then I would be reluctant to use the slow twist
This is a good example of what I was seeing and it was one of the more dramatic holes.
This morning I ran to the farm and posted a target up at 180 yards. The Garbanzo Beans were just to tall and at 200 they obscured the target.
I was shooting the same 45 Knight DISC Extreme and I also took my 50 Ultra-Lite as another testing tool. I took 5 shoots on target with the 45 and two with the Ultra-Lite. And again I was shooting 110 gr. of T7-2f. The grouping certainly were not the best and at 180 yards I was definitely showing some yawing was occurring.
There are a couple of possible problems, other than the twist rate. In the 1-30 that bullet will need every bit of twist it can get. It needs to make every turn. In that thought - if the bullet slips in the sabot at all or skips some lands going up the barrel it will not get the rotation it needs. Remember mathematics already says it con not be shot from a slow twist, and if there is any slippage at all there is no chance. The MMP sabot seems to fit the bullet a little tighter than does the Harvester and the MMP seems a little tighter going down the barrel. Then I am not helping my cause with the barrel heat that is existing.
Here is the target as shot.
The first group was fired one shot right after the next. The second group of two were shot with some cooling time between shots. Then I switched to the 50 Ultra-Lite using the same 110 grain load and a MMP 40x50 Blue sabot. Even on a cool barrel that loader easier than I wanted it to, but I was loaded so I shot it and then decided one more shot just for the heck of it. I can not say I was pleased with any of the shots or the groups but it was something I felt I needed to know.
When I walked back out to the target and looked at the holes I felt there was some yawing showing on all of the paper hole. Removing the target from the plywood verified that thought. Then as a better indication of what was happening I plugged some bullets in the holes and it became really obvious in most of the wholes... All of this a created another "I wonder" I wonder what is drooping the nose of the bullet or the tail of the bullet when it hits the target.
Upping the charge to my normal 120 grain load or even higher would probably fix the problem - but even then I would be reluctant to use the slow twist
This is a good example of what I was seeing and it was one of the more dramatic holes.
