For a .22
Top man, thanks, I can make a few up tomorrow afternoon and have a play over the weekend.
I just removed the brass insert, and left the pick in place.
I'd really suggest buying a sample pack of Jumbo's 13.xx and beasts 16.xx.Had my hands on one today. Looks like im going to end up buying one when they're back in stock
A word of warning for those fiddling with them, make sure you put some heavy 10.34s through it as there seems to be quite a surpising difference in power between a 8.44 and 10.34 on these. More than i was expecting
I use 10.65 Bisley Magnums for chrono testing. I have tried slightly heavier, but noticed a reduction in power with my test pellets beyond the Bisleys. I have also noticed a staggering difference in power with these particular rifles between the heavy and lighter weights, usually in the region of 2 to 3 ft/lb. Right out of the box, my AP900 was running at12.3ft/lb with the Bisleys. Thankfully after a fair bit of fettling, it now tops out around 11.7, but with its preffered JTS 10.4grn I get around 11.4.
That all sounds sorted then. It always worries me how few people test anything heavier than 10's.
I have been playing about with various setting to see the impact of incremental changes. I have been doing all the tests using Victory Shocks, because in the past, they have given similar fps to Exacts and are much cheaper for testing. But I thought I’d put some Exacts Heavies through, wow, an extra 0.98ftlb. I haven’t had that kind of increase with any of my other rifles. I think I have some jumbos in a drawer, I’ll have to look them out and give it a go.
I made up the pucks yesterday afternoon, but found that I only have bits going up in 0.1mm increments from 2.48mm. But I plan to have a low reg setting, so the bigger TP diameters are more relevant. (.177).
