Ordered some bisley magnums 4.52 and some jsb exacts also in 4.52. Hopefully the jsb's will be good in my Air arms 510 .
JSB 10.34s or HW branded heavies (the barracuda match variation)
I’d put money on one of those two shooting tightest groups
Looking for TO-6 Trigger unit unmessed with or T0-6 kit for 34