View Single Post
Old 5th May 2014, 06:58 PM
Artfull-Bodger Artfull-Bodger is offline
Senior Member
Join Date: Feb 2010
Location: Llantrisant
Posts: 308

I have a Pro Target here, when doing grouping tests I noticed if the pellet was a little tighter in the breech the group opened up, so I shot the group only with the pellets that loaded easily, the tight ones were just shot off, end result was a 15mm c-c 10 shot group at 55yds with JSB Express!

These were in 4.52 on the tin but when I checked a sample most were 4.51 with about 1/3 4.52,and a couple in the 4.50 and 4.53 region, so I have come to the conclusion the barrel does not like a tight fitting head.

I will be sourcing some 4.51 batches soon for test to see if this supposition holds up!
Reply With Quote