Well, we finally got some warmer, calm weather today, so I decided to go shoot a few groups. I decided to turn my hammer spring tension back down to where Martin had it set (initially I had added a 1/2 turn, so I took that back out). I shot 8, 5 shot groups at 50 yards, from my benchrest setup (see below). Four groups were shot with the JSB heavy Mk I pellets, 4 were shot with the JSB heavy Mk II pellets.
Overview photos are below, along with the highlights of the best groups-including the tightest 4 shot group I've ever shot, or seen in my life (I got all mental on the last shot, and completely shanked it!). Tightest 5 shot group with the Mk I heavies was 0.240" ctc, tightest 4 shot group with the same pellets: 0.078" ctc! Talk about blown away! I had to remove the target and measure the holes in the wood to double check I was measuring correctly. Actually-shanking that last shot give a nice comparison of what a single, .25 cal hole looks like next to the 4 shot group. I couldn't believe it-they were literally dropping into the exact same spot, shot after shot!
Setup photo:
Overall photo of the 8 groups (Mk I pellets are on the left column, Mk II pellets are on the right column):
Optical / App measurement of top left group (0.240", ctc, 5 shot group):
Measurement of the hole in the wood from the same group:
Tightest 4 shot group at the bottom left (0.078" ctc, 4 shot group, 50 yards):
Measurement of the hole in the wood from the same group:
Photo of the wood, showing the perspective of 1 single .25 cal JSB Heavy hole next to the 4 shot group:
And the weather conditions (for those of you in Arizona. Florida, etc that don't get to enjoy this beautiful weather!):
To same I'm pleased is a significant understatement! I'm blown away at the accuracy potential of this gun / combo! Again, these are all unwashed, unweighed, unsorted, unlubed pellets-straight out of the tin.
Sean