I picked up a Rock Island MAPP (Tanfoglio Witness-P Compact) in .22 TCM9R late last year and finally got a chance to have a range day and shoot it a couple months ago. I am just now getting around to posting about this because work and life have been keeping me rather busy and I hadn't had time to do any research till recently.
I was having one major issue through out shooting two boxes of ammo through the pistol, which I did do a field strip, wipe down, and lube on prior to hitting the range. I was having the pistol fail to fully go into battery about 85-90% of the time. A small push with my thumb on the back of the slide and it would snick that last 1/8" forward under spring pressure each time. I had no other types of failure, feeding from the mag (no nose downs or stove piping feed issues at all), ejecting, or otherwise. My ejection was consistent and within in a fairly small area, but it was launching them a good 20-25ft away. Because of this, I am thinking the recoil spring may be a tad too light, both failing to slow the slide enough on the reward stroke, causing the empties to launch so far, and not having enough strength to ensure the gun goes fully into battery. The problem is, I can neither find the factory spring weight for the TCM9R models, nor can I find any options for +power springs for this application. Anyone have any experience with similar issues, or am I best off e-mailing Martin at RIA and seeking assistance from the source? Thank you in advance for any help anyone can offer.
-Eric