It would seem that a thread like this is long overdue.
I've been following the topic on RFC and other blogs for over 2 years, and it's quite apparent to me that even "the experts" are pretty clueless about what causes many types of jams.
The Mark III pistol I bought in October 2013 had a LONG LONG LONG list of problems. It was produced as part of the "million gun march". So, much of my time has been spent addressing all sorts of things. But the most pervasive and insidious of all has been the tendency to jam.
NIB - it had a 60-70% jamming rate, regardless of what ammo I used. The only one that did fairly well was CCI Stingers, with a WAY lower rate of only 10%. The worst was Winchester 555 at nearly 90%. Even SGW has problems with the Winchesters:
----------------------------------------------------
JAM TYPES:
FTFire
1) good hit, no bang (DUDs)
2) light hit, no bang (fires on re-try)
FTFeed
3) feedramp jam (stuck at bottom of ramp)
4) over-run jam (bolt over-runs the rim)
5) overshoot jam (missed the chamber)
6) partial feed jam (stops part way in)
7) tip-up jam (hits top of chamber mouth)
FTE
8) still in chamber (FTExtract)
9) stovepipe (FTEject)
----------------------------------------------------
PRIMARY CAUSES:
1) Bad ammo.
2) #####
3) #####
4) #####
5) #####
6) #####
7) #####
8) #####
9) #####
----------------------------------------------------
I see all kinds of speculation and guesses about the causes. Do any of these "fixes" live in your "toolbag"?
Avoid using ammo brand X
Try a different magazine
Tip up the first round
Try replacing the -----
Sound familiar? I admit, I avoided Winchester 555 and a few other types/brands myself until recently. What did you get for Christmas? I spent my Christmas morning making (yet another) set of mods to my pistol. Even though mods I made over a year ago had my pistol running "good" ammo very reliably, it wasn't until Christmas that my pistol learned to LOVE Winchester 555 HPs.
I can now put any brand or type of .22LR SV/HV thru my pistol with at least 99.9% success. I think that qualifies me as some sort of an expert on jamming.
Over the course of the last year or so, I have mostly posted mods that have made my gun easier to take care of. The overall response from RFC members has been pretty luke-warm. I won't waste my time posting how to "jam proof" a mark pistol if nobody cares.
So the question is:
Does anybody want to know what really causes most jams?
As with most/all of my mods, they are meant to prove that these guns can be made better for their owner - not that you should change them from stock.
I've been following the topic on RFC and other blogs for over 2 years, and it's quite apparent to me that even "the experts" are pretty clueless about what causes many types of jams.
The Mark III pistol I bought in October 2013 had a LONG LONG LONG list of problems. It was produced as part of the "million gun march". So, much of my time has been spent addressing all sorts of things. But the most pervasive and insidious of all has been the tendency to jam.
NIB - it had a 60-70% jamming rate, regardless of what ammo I used. The only one that did fairly well was CCI Stingers, with a WAY lower rate of only 10%. The worst was Winchester 555 at nearly 90%. Even SGW has problems with the Winchesters:
My pistol has seen literally thousands and thousands of jams. Here's a list of the types I have identified:
----------------------------------------------------
JAM TYPES:
FTFire
1) good hit, no bang (DUDs)
2) light hit, no bang (fires on re-try)
FTFeed
3) feedramp jam (stuck at bottom of ramp)
4) over-run jam (bolt over-runs the rim)
5) overshoot jam (missed the chamber)
6) partial feed jam (stops part way in)
7) tip-up jam (hits top of chamber mouth)
FTE
8) still in chamber (FTExtract)
9) stovepipe (FTEject)
----------------------------------------------------
PRIMARY CAUSES:
1) Bad ammo.
2) #####
3) #####
4) #####
5) #####
6) #####
7) #####
8) #####
9) #####
----------------------------------------------------
I see all kinds of speculation and guesses about the causes. Do any of these "fixes" live in your "toolbag"?
Avoid using ammo brand X
Try a different magazine
Tip up the first round
Try replacing the -----
Sound familiar? I admit, I avoided Winchester 555 and a few other types/brands myself until recently. What did you get for Christmas? I spent my Christmas morning making (yet another) set of mods to my pistol. Even though mods I made over a year ago had my pistol running "good" ammo very reliably, it wasn't until Christmas that my pistol learned to LOVE Winchester 555 HPs.
I can now put any brand or type of .22LR SV/HV thru my pistol with at least 99.9% success. I think that qualifies me as some sort of an expert on jamming.
Over the course of the last year or so, I have mostly posted mods that have made my gun easier to take care of. The overall response from RFC members has been pretty luke-warm. I won't waste my time posting how to "jam proof" a mark pistol if nobody cares.
So the question is:
Does anybody want to know what really causes most jams?
As with most/all of my mods, they are meant to prove that these guns can be made better for their owner - not that you should change them from stock.