What causes a breech to lift up.

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leadslinger

Post subject: What causes a breech to lift up.

Posted: Wed Feb 07, 2018 2:31 pm

Joined: Mon Aug 08, 2016 7:23 am
Posts: 4259
Location: Somewheres near the Atlantic

So I got a maximus, I put in a 177 barrel. But no matter what transfer port I put in, stock, enlarged etc. It still lifts up forward of the breech screw. The TP sits well in the barrel. Same as the stock barrel.

What would be causing this?

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joe hickey

Post subject: Re: What causes a breech to lift up.

Posted: Wed Feb 07, 2018 2:55 pm

Joined: Sun Jan 09, 2011 8:07 am
Posts: 3320
Location: Central West River Nova Scotia

My guess you’re using a .22 cal TP with a .177 barrel. The shoulders on the TP of a .22 cal are wider than .177 to accommodate the larger hole. You need the proper TP or drill out TP shoulders on the barrel. Make sure the TP you’re using is right side up. One side is slightly wider.

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If I had only one wish, it would be to be able to "unsay" things.

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leadslinger

Post subject: Re: What causes a breech to lift up.

Posted: Wed Feb 07, 2018 4:18 pm

Joined: Mon Aug 08, 2016 7:23 am
Posts: 4259
Location: Somewheres near the Atlantic

Thanks was not aware the TP were different between cals.

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pelsby

Post subject: Re: What causes a breech to lift up.

Posted: Tue Feb 13, 2018 6:49 pm

Joined: Sun May 20, 2007 10:26 pm
Posts: 539
Location: Any Town ONTARIO

? I have observed the transfer ports in both calibers and they were identical red anodized aluminum with the same size holes .

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joe hickey

Post subject: Re: What causes a breech to lift up.

Posted: Tue Feb 13, 2018 8:58 pm

Joined: Sun Jan 09, 2011 8:07 am
Posts: 3320
Location: Central West River Nova Scotia

pelsby wrote:

? I have observed the transfer ports in both calibers and they were identical red anodized aluminum with the same size holes .

You’re probably right. I assumed the tp setup was the same as the 22xx series of crosman guns.

_________________
If I had only one wish, it would be to be able to "unsay" things.

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Cougar

Post subject: Re: What causes a breech to lift up.

Posted: Fri Feb 16, 2018 3:59 pm

Joined: Wed Nov 02, 2016 2:27 pm
Posts: 133
Location: Brampton Ontario

The stock tp in my Maximus was red and the one I purchased from Canadashooterssupply was silver with a bigger hole and the one I purchased from baker air guns in the states has an even bigger hole. They are all suppose to be for 22cal. The one from baker is suppose to be the American port. You can see the difference in hole sizes.

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