I thought I would pass along my experience in case others are having same issue.
I was having a vertical stringing issue - up to 6 inches, and almost always on first shot out of magazine but also sometimes throughout the string. The normal pattern was first shot 6 inches high and following 2 were touching at 100 yards.
I was loading 45, 45.5 and 46 grains of varget, using 165 gr hornady interbonds or SST's. The interbonds were set at and OAL of 2.8 but I seated the SST's to the crimp ring 2.763 (only loaded 3 as I want to hunt with interbonds). With the interbonds I was having same issue I had with factory large vertical stringing. Then at end of my frustrating session I took out the SST's and fired all three as fast as I could while still aiming somewhat and to my surprise all three were in a nice 1 inch group. Only real difference was OAL of 2.763.
Back to the bench loaded up 45.5 grains of varget case length of 2.005 and OAL of 2.785 and 2.775. And the results are with the 2.785 - same vertical stringing but only about 3 to 4 inch too high first shot. For the 2.775 the 4 shot group (first from mag included) was 1 and 1/8 inch. And I repeated that 3 more times. Last string was back to 2.785 and stringing was back.
So for my gun the OAL of 2.775 is the solution, not sure why as I checked the length of my chamber and it is 2.87 so 2.8 should have been no issue but it is for some reason.
Hope this helps someone. Shayne
I was having a vertical stringing issue - up to 6 inches, and almost always on first shot out of magazine but also sometimes throughout the string. The normal pattern was first shot 6 inches high and following 2 were touching at 100 yards.
I was loading 45, 45.5 and 46 grains of varget, using 165 gr hornady interbonds or SST's. The interbonds were set at and OAL of 2.8 but I seated the SST's to the crimp ring 2.763 (only loaded 3 as I want to hunt with interbonds). With the interbonds I was having same issue I had with factory large vertical stringing. Then at end of my frustrating session I took out the SST's and fired all three as fast as I could while still aiming somewhat and to my surprise all three were in a nice 1 inch group. Only real difference was OAL of 2.763.
Back to the bench loaded up 45.5 grains of varget case length of 2.005 and OAL of 2.785 and 2.775. And the results are with the 2.785 - same vertical stringing but only about 3 to 4 inch too high first shot. For the 2.775 the 4 shot group (first from mag included) was 1 and 1/8 inch. And I repeated that 3 more times. Last string was back to 2.785 and stringing was back.
So for my gun the OAL of 2.775 is the solution, not sure why as I checked the length of my chamber and it is 2.87 so 2.8 should have been no issue but it is for some reason.
Hope this helps someone. Shayne
