Tuning Just received my Impact. 30 superior barrel kit

Was the barrel kit bought new or used?

As far as O-ring sizes I just read somewhere the older and newer ones are different. Actually I heard it on one of Ernest's videos last night concerning installation of a new transfer port. I think it is this one.



https://youtu.be/xe6SrDu7Kms

I believe he is working on a .30 and if you take a look at the picture there is a gap, but his O-ring is actually covering the threads itself.

I have 4 barrels in .177, .25 and .30. Only the .30 has any play in the o-ring, and it is not near what you have there, all of the others are snug at both sides.

Looks like you got it figured out though.

Yeah its normal on .30, fear not.

I wondered this myself. have the same gap on an aftermarket transfer port. .25 Ernest Rowe.

I wondered this myself. have the same gap on an aftermarket transfer port. .25 Ernest Rowe.

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Thanks everyone i will install the barrel and see how it does.

Regards Marko

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Look inside of the breech port to see if the barrel does not have a gap between it and the brass transfer port. If it does not have a gap then you are good there.

It would be best to put a second o-ring on there, even if is a smaller diameter, to take up the.space so the proper sized o-ring sits on the sealing surface. There is a possibility of the single o-ring staying on the threads which will allow air blow by at the shot.

Marko, I would say it is not screwed in all the way being the threads are exposed. Yes, there is always an uncomfortable gap, and the O-rings are of different sizes, which is normal, but that gap appears to be excessive compared to mine. I have the exact same setup. All I did was put a 1mm CS O-ring in front of mine and it filled the gap up nicely and stood the O-ring up straight. It doesn't look like that would work in your case. What I used was a .25 cal OD liner O-ring. Whatever that size is as the filler. It barely fits the gap I had.

Thanks Triggertreat i already installed the liner and looks it works just fine.

I also tried to tighteen it more but i think loctite prevents that.

Regards Marko

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As long as you are happy...Did you check it against a loaded projectile to see if it cleared the port completely, That's the important part. Old Loctite is typically the cause of one not screwing in all the way. The threads have to be fully cleaned and a test run done before applying more Loctite for a final install. There's no telling what the history is, even if new.

If if were mine, I would place it in a protective vise, hit the brass with a lighter for a few and unscrew it. Then clean up the threads and do a test run before applying more blue Loctite. That way you will know for sure it is all the way in. It's really easy, but takes a few minutes to do.

I don't understand the part where you said that i should check it against the loaded projectile though.

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You just want to make sure the projectile being used clears the port once chambered. If you chamber a load then pull the barrel real quick, that'll give you the answer when looking at the port.