I bought the Gunfixer plug and installed it. WOW! LIKE FLIPPIN' MAGIC...my gun worked fine with the exact same ammo on the low-brass setting of the new plug.
Gunfixr or the V plug? They are similar but identical and your story has changed.
I am aware of MD's bases for a claim in efficiency with these plugs and it indicates that the difference is rather slight. He at one point claimed he could prove mathematically that the V plug worked better but when asked to do so went silent.
There was another lengthy thread on the S12 boards about these plugs and their effect on under gassed guns.
It
might be that a gun on the very edge
could be made to work by this slight increase in efficiency. It would stand to reason the lager chamber caused by the deeper counter bore
might have the opposite effect. At any rate any under gassed problem would have to be extremely slight for the plug to remedy it, if it in fact did.
I've seen guns with a bur(s) in the action that didn't run and after being shot a bit and hand/or cycled it gets knocked off cycles fine. Polishing the action (either through use or doing it yourself make the action cycle with notably less force. Some times it is only a matter of putting a rather small number of rounds through it.
I have in the years since the Gunfixr plug came out actually seen very very few people claim it alone made an under gassed gun function.
Perhaps instead of blasting other people's suggestions, you could offer some more of your own.
I did. I suggested he check his ports. That is the most logical first step in trouble shooting consistent FTE problems. If there is a major problem with the ports all the other steps one might take are very unlikely to fix the problem. A 2 port gun for example will very likely never run light loads no matter what else one does. Counting the ports and seeing if they are really open is free.
but $25 for a highly potential solution
It really probably isn't a
high potential solution. It is a good product to have though, if for no other reason than one can manually change setting more easily. I think its worth owning.
I am not being rude, but it seems you have a vendetta against commonly-had solutions, although I agree that the twister-puck is unnecessary.
Because I refereed you to the person who designed it saying it wont fix a particular problem I have a vendetta? That is rich.
If it were my gun I would:
1) Check the ports, if there was an issue there I might well get warranty work done (most people don't want to do that work themselves it seems). If there was no problem there I would:
2) work the action and see if there are spots its hanging up. If the gun has a G2 it the hump on the hammer could be an issue. I would likely reshape that hump like the folks selling modified FCG for the S12 do.
3) I would polish the bolt, bottom of the bolt carrier, the hammer, the rails, and where the carrier rides on the rails. The difference in how the action cycles between all new parts and ones polished mirror smooth is striking if you work one after the other.
If none of this worked I would then either look to tune the extractor or perhaps put a lower powered spring in it.
As to the magazine what I did would probably be based on what type of mag it was and what exactly it looked like was happening.
I'm sorry to have confused the issue with information from the people who designed the products being discussed. I'll leave it to the experts to guide you through this based on their vast experience of owning one gun and misinterpreting advertising material.
To the OP good luck. You may want to consult the saiga forums.