Impact probe

I installed the NSA pin probe kit in my .30 MKII and .25 M3. 

I installed the Ernest Rowe transfer port at the same time so I don't know what I would have gained with just the pin prone. 

I shoot a NSA .30cal 49.5gr slug 965 at 145bar and a NSA .25cal 36.2gr slug at 985fps at 135bar.

I have the FX slug power kit in my. 30cal so I did use the pin probe for a while in my .25cal. I is a pain to adjust the seating depth because of that tiny 1.5 mm set screw

The NSA pin probe is so much easier to adjust the seating depth of your slugs to get maximum accuracy. 

They extremely well made and easy to install. 



BC

I just adjusted the probe until the slug was just seating into the rifling a little bit. 

I was get very tight groups at 50 yards, easily ½ MOA and at 100 yards about 1MOA.

That was where I left it.