Have just picked up a new Impact M4 Sniper in .22 cal. and before I start testing loads of different slug diameters I wanted to do a little research into what the barrel ID is. Does anybody know if FX aims to achieve a specific bore dimension or do all the barrels get spat out with .003" to .004" tolerance?
And a second question...
If I have to go down the road of testing three or four different slug diameters what am I looking for when testing? Velocity changes, accuracy inconsistencies, a jammed slug in the barrel. What are some of the signs that determine one slug is too narrows and another too thick?
Answers and advice are greatly appreciated.
Dave
A PCP newbie.
And a second question...
If I have to go down the road of testing three or four different slug diameters what am I looking for when testing? Velocity changes, accuracy inconsistencies, a jammed slug in the barrel. What are some of the signs that determine one slug is too narrows and another too thick?
Answers and advice are greatly appreciated.
Dave
A PCP newbie.
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