I have a 25cal,700mm, M3,stock except for ST top rail with barrel bushing. I also have the Superior Heavy liner. Tried most of the NSA slugs and the 29.5 dish base shot the best. Problem is that on 2 different batches I received, shot all over the place. Nothing was changed on my gun. All my test were on very calm days. I got 1.5 MOA @ 100 yards consistently. Except for the two batches very good result. I have spent $600.00 on NSA slugs. So I ordered some Zan 37 grain. My gun was tuned back to the FX 34 grain pellets, shooting at 930 fps. My groups were constantly under 1.5 MOA on calm days. I shot 10 rounds of the Zan 37 grains and stacked them all at 50 yards @ 890fps. WOW! No changes to the settings. Can anyone share some setting and velocities to get started. I know the fps is to slow and also need to change liner. These have a texture to the surface( probably to help with stability). Do they need lube? Hope some info from member can save me some $$$$.