The last two range visits, I’ve been shooting my XP Comp 2011, attempting to test/review from an owner standpoint.
I’ve been shooting steel-cased ammo lately, specifically Magtech 115-gr FMJ. My Alpha Foxtrot Attila just eats up that ammo, without complaint. Both of my Fusion Firearms 2011s hate that ammo, though. I’ve both the XP Pro and XP Comp. While they eat will shoot the ammo, they ocassionally will not fully go back into battery (sometimes, but not always).s
The last range visit, I actually anticipated the issue and bought some brass-cased Federal 115-gr FMJ. I shot much of that ammo through both XPs, without issue (50 rounds of it). Whenever I’d swap back to the Magtech (purposely attempting to determine if it was an ammo issue), the failures would occur, so I know this is due to the ammo.
Now, this particular make/model of ammo is using polished steel casings, so it’s not the case coating that’s the issue. I think the ammo is slightly underpowered – most steel-cased ammo is cheaply made.
A while back, I bought a spring kit from Fusion Firearms. That kit comes with 7-, 9-, 10-, and 13-lb springs. The XP Comp comes with an 8-lb spring. As I didn’t think the 9-lb spring would cure the issue, I opted to install the 10-lb spring instead.
I also conducted research and the above is a satisfactory solution. Alternative solutions would be to switch to a better ammo type (brass cased or a make/model with a known good reliability history).
I do not blame the ammo as the cause of this issue, as most guns with comps will have light sprints and this is a known thing with the XP Comp. As well, the XP Pro has light springs from the factory, so that’s why it was exhibiting the same issue.
My fix will hopefully resolve the issue (at least with the XP Comp.
While I love Magtech ammo, I might need to switch to something with a bit more power, at least until the XP reaches 1000 rounds. I may go back to Winchester White Box, as it has power.