Primer Fit & Blowback
 

I've seen a couple of posts recently about primer fit and blowback, and got to wondering if I'm the only guy that adjusts the breechplug for a tight seal.

I use teflon tape on my plug, and screw the plug in against the stop. Then I put a primer in and close the action. If it closes easily, I open the action and back the plug out 1/8 turn, then close it again. I keep doing that until it will no longer close. Then I turn the plug in 1/8 turn so the action closes tightly against the primer. The tight fit really reduces blowback.

Does anyone else do this?

My Endeavor has the Speed Breech XT which has ZERO blowback. So I don't need to adjust anything. :happy0001:

Semi

I do have somewhat of a problem with that, and maybe it is all in my mind. But it is my feeling that if a plug is loose - it has movement - maybe not much but it has movement. I think anything that is suppose to hold pressure should be snug to tight. Anything that is allowed to work back and forth will work and any time sumoething can work it is subject to failure either from metal fatigue or pressure constantly pounding the plug back against the threads....

Guess I am old and haver just been around machinery and mechanics to long... Probably nothing wrong with what you are suggesting - I just could not do it.

I adjusted my Omega for a tight lockup and I have no blowback at all.My last inline was a Rem 700ML.You want to see blowback? That it why I bought the Omega(at least one of the reasons)

Charlie

I hear you Sabotloader, but I can't see a problem. Actually, I do this with the Mustang. The plug doesn't have any "wiggle" when it's backed out (just a tad - probably a little more than 1/8 turn from fully seated) and, after all, the plug/primer are tight against a solid steel breech face so I don't see how it could be pounding the threads. I don't bother with the X7. It's so clean that I just snug the plug against the stop.

Have a H&R Sidekick (huntsman), no, zero, nadda blow back.
Bought an after market Breech plug for $28.00
it has an O ring in the bottom of the primer carrier hole, the primer is a couple thousands proud when you drop it in, closing the action "squashes" it into the o ring.
The O rings are from Lowes 2.99 for 100.

Love this gun

Interesting! One of those threads was probably mine on MM. I'll certainly try that because I may be able to get more out of my worn plug that is more accurate then a new plug. I would have thought that would cause more of a gap in the action having the reverse affect.

Hey Cajun, if you try it let us know how it works for you.

Semisane, as mentioned in my thread, I use the T7 Primers in My SS/Camo ACCURA and they fit loose in the Breechplug wich causes me blowback, would a small pice of teflon tape on the primer work to tighten the fit of the primer in the breechplug?
There is a good fit between the primer and firing pin so no need to adjust or back out the breechplug, or in my case I can even back out the firing pin screw on my ACCURA. In My SS/Bk ACCURA I use Win W209 Primers, they fit tight in the breechplug, so that combo is O.K. I may just change to Win 209 Primers in my SS/Camo ACCURA after the Season, but I have about 7 or 8 packages of the T7 Primers so that would be a waste of about 800 primers, plus they work good as there not too hot and they are a tad longer for a good fit, but they are thin in the BP.
As Sabotloader mentioned the (slack) or (looseness) by backing out the BP may cause problems down the road with the excessive pressure against a slightly loose BP might happen, he may be right. But the BP's do have a-lot of threads on them and if you do just loosen the BP out just a 1/4 turn, it should'nt matter as the BP is still tight, especially if you use Teflon Tape on it. So who know's what will happen in the long run with a 1/4 turn backed out BP for a better fit for the primer. Let us know if you experience any problems with this down the road.
For now Im gonna try some Teflon Tape on My T7 Primer's fit in the BP and see if that solves the problem of Blowback.
(BP)

Using teflon tape on the primer sounds like a real hassle Breechplug. I think it would be pretty difficult to get the tape to stay in place while inserting the primer, and if you did get it in place you may end up having to pick the tape out of the primer seat between each shot. Let us know how that works for you.

I would not back out the firing pin screw. Backing out the breech plug pushes the primer against the breech face, creating a tight seal.

Why couldn't you try the o ring in the omega or encore see if it works can't hurt only problem I see is the breech might not close.

With the Accura (or similar), if I had such a problem, backing out the firing pin retainer would probably be the better way to go so long as it didn't interfere with action operation and the retainer threads still had sufficient engagment. It would be easy enough to make a shim to go in behind the retainer but it might not be easy to achieve the right thickness. Bellm sells such shims for the Encore system and those might be fitted easily. If a .001" or maybe .002" wouldn't do the trick, I wouldn't mess with that either.

I want my breech plugs always snugged up but I will admit to having experimented with them just as Semi describes. In a rifle where a shim would work safely, that's the route I would take.

Have not considered this before or tried it, but how about an "O" ring at the base of the breech plug. I imagine manufactures played around with somthing like that and rejected it though.

Aha, I beat you to the punch on one idea finally! ;) Had the idea and mentioned it to Busta. He went to town with it and did a lot of testing with various O-rings. It works perfectly if you can find the right thickness o-ring and the life of the o-ring isn't much of a factor at about 3 cents each.

I still haven't tried it - there's been no need of it lately. ;)

The de Bange obturator is used on the breech face of artillery pieces that use bag charges. It positively seals the breech from powder gases. i would like to see a machinist make a minature de Bange obturator for muzzleloader breechplugs.

http://en.wikipedia.org/wiki/Charles_Ragon_de_Bange

my ENCORE has some blow-back and it is not the breech plug ,it seems to come from the loose play between the primer and breech plug .

Man, that's a new one on me Falcon (sounds dirty, so I like it). Thanks for the link - it was an interesting read. If someone tried to market one for muzzle loaders using the original design they would probably get into deep government doo-doo with the asbestos.

Get this one.....I received a call from CVA today, they needed my credit card info for a scope mount and rings I returned that should have never been sent as when I ordered them I told the guy at CVA that I already had the Z2 Alloy Mounts and I wanted the older style CVA Scope Rings and Mounts, they were also See-Thru but the older style sat lower and were a better fit for my ACCURA and I did'nt have to pick my head up so far to see through the scope, anyway they sent me the same set! I called and they said they discontinued the other kind, dont you think they should have told me that when I ordered them. So I had to call CVA to return them and if you ever tried to call CVA you get put on hold for about 20 minutes, and they dont even have a 1-800 number, so when I got my phone bill today there were about $20 worth of charges for calling CVA to order parts!!!
NOW for the good one and back on the topic........I mentioned to the guy at CVA and Im not gonna mention names, about My ACCURA and the looser than normal hole on the CVA's Breechplug for the primers, and that they fall out if you turn the ML down. He said dont turn it down,,,,LOL.....it get's better......he told me to get a-lot of Carbon build up in the Breechplug and they will fit tight and not fall out! I hung up the phone........I did'nt need to pay for more bad advice!
(BP)

i think what he was trying to tell you was.... Keep shooting! LOL. All of the inlines ive had. even my omega, the primers would just fall out if you tipped the rifle up. Keep shooting that sweet little shooting Accura and enjoy it. Im no worried about the dirty primers in mine.

If anyone has that type problem on the Encore { mine does not} then remember you cn adjust the head space to take care of it and if you use center fire barrels it is a good idea to check and adjust the headspace, if you reload it will make your brass last longer. Lee