In my post a couple of weeks ago I showed you groups with the .50 GM/LRH Renegade that were an inch or less wide, but three to five inches high. (
http://huntingnet.com/forum/black-po...-renegade.html )
Those groups were with 300 grain Gold Dots and Triple Seven. I couldn't figure out why I was getting that vertical stringing.
Whenever I have a grouping problem I give GOEX a try, as I always seem to be able to find a GOEX load that will shoot well. So Friday afternoon I gave it another try, but with 250 grain XTPs and GOEX.
The two targets below are typical of what I got in the shooting session. One group is only
5/8" wide, the other has
four shots that are 1/4" wide. But the groups are really strung out vertically.
If any of you guys have any ideas or suggestions, I'm willing to try about anything. I'm convinced those narrow groups are telling me this gun will shoot one-inch 100 yard groups if only I can solve the vertical stringing problem.
Shooting procedure:
- Shot #1 on the first target was from a fully clean dry bore, after that the bore was wiped with both sides of two fairly wet alcohol patches between every shot, followed by two sides of a dry patch.
- A stop collar was used on the loading rod and set so that the load was compressed 1/8" each time. There was no variable there.
- The forestock and buttstock were placed at the same spots on the bags each time.
- The gun was not held with the left hand.
- I paid particular attention to gripping the wrist with the same amount of tension with my right hand, and holding the butt against my shoulder with the same amount of pressure - snug, but not tight.
- The sight picture and trigger action felt good for every shot and I concentrated on "follow through" to the extent that I know the crosshairs were on target as each shot went off.
The barrel wedge on this gun is easily removed with finger pressure. I began to suspect some sort of bedding issue. So I shimmed the underside of the barrel with a double layer of duct tape for the second target. That made the barrel really snug in the stock, but didn't have any effect on groups.
