Crosman Steel Breech

[AS13]

Got my long steel breech from Crosman yesterday. To my surprise the breech screw hole was in the front Anticipating the rear screw hole, I had modded my hammer (cut a notch) Oh well...No big deal. I thought that the Crosman steel breeches had the rear screw hole. Did I miss something here

[quickster47 †]

Was the new breech for the 1377 series of guns?   

If I remember correctly the 1377 main tubes do not have the second hole drilled and tapped for the rear breech screw.

Carl

[bgmcgee]

I thought only the custom shop guns get the breech with the rear hole and maybe the disco but it doesn't heve the dovetail notch cut into it. Gets more confusing all the time.

[AS13]

It was the 2240 kit. I would think the front screw hole would make a better seal between TP and barrel

[vertguy]

I thought only the custom shop guns get the breech with the rear hole and maybe the disco but it doesn't heve the dovetail notch cut into it. Gets more confusing all the time.

I believe you are correct as my .177 cal steel breech kit also had the front hole, but my 2400KT had the rear hole.

[bgmcgee]

It was the 2240 kit. I would think the front screw hole would make a better seal between TP and barrel

I feel the same. The big plus with the rear screw is a smooth transition to load the pellet especially .177.

[AS13]

I believe you are correct as my .177 cal steel breech kit also had the front hole, but my 2400KT had the rear hole.

Same here...My 2400KT had rear breech screw

[Flex]

Got my long steel breech from Crosman yesterday. To my surprise the breech screw hole was in the front Anticipating the rear screw hole, I had modded my hammer (cut a notch) Oh well...No big deal. I thought that the Crosman steel breeches had the rear screw hole. Did I miss something here

I have purchased 4 steel breeches over the past year. 2 kits directly from Crosman and 2 steel breech only from a Crosman authorized dealer. ALL of them had the "front" breech hole configuration. It might be that you have to ask specifically for the "rear" breech screw hole configuration to get that type. Flex

[BillK]

A guy at GTA just went through the breech types and after getting the wrong one did get the correct part #s.
Long steel breech w/rear screw location: AS2250-025
Long steel breech w/front screw location:  AS2250-A013

The 22xx tubes have both front & rear screw holes in the tube.  The 13xx tubes have only the front screw hole.

Its cheaper to order just the breech and needed parts from Crosman than to order the breech kit.

[Davio]

Newly manufactured non-CCS tubes that are built into guns and sold usually have tubes with BOTH holes.  But the factory tubes by themselves are mostly of the front hole variety. At some point I would expect all replacement tubes to have both holes all the time.

This situation actually causes me grief in that breeches would not be served well with both locations, so that adds another variation to the complexity of the possible.

When you read somebody wondering why Crosman doesn't do this and that, this is the reason why.  It get WAY out of hand REAL FAST!

Just with Crosman steel breeches we already have short and long, and breech screw fore or aft... so that is four possible versions.

Now lets add LH, RH and ambidextrous to the above and we are up to 12 versions. 

Then add blued steel, aluminum anodized, brass and stainless.  We are at 48 versions. 

Want a choice between dovetail and Weaver/Picatinny?  Now we have 96 versions. 

Provisions for LPA MIM or a standard rear sight or nothing (for optics only) and we have 288 possibilities!   

All of the above a major design machined differences with no opportunities for either/or.  Variation / complexity sucks on the manufacturing end, but we do love to have our choices, don't we? 

[airriflenut]

My 2400KT has the rear breech screw and the two tapped tube holes, which led me to a thought.  I may be alone on this idea, maybe not.  On both the 13xx and 22xx have the tubes tapped with front and rear holes AND have both screw holes in the breech.  An extra strong breech mounting, an extra hole in case one gets stripped.  Just a thought.

I built the .177 Beast from a 2240...front breech screw.  Since it is atop a BnA riser it has the longer breech screw, a slotted screw.  Pellet hang-ups were driving me nuts so I used a diamond ball bit in the Dremel and made a "feed ramp" on the forward edge of the screw hole.  Pellets don't get hung near as often.

[fasteddy]

I experienced this recently when I tried to put the steel breech from the ccs (rear location) onto a 1322 (front).  I drilled the front hole in the breech only to realize that it wouldn't work (no recessed space for the screw head).  Do I have to drill & tap a hole at the rear location?  Or just drill a hole (and if so, any idea what bit to use)? 

[airriflenut]

fasteddy, the correct tap drill for a 4-48 screw is #40 for steel.

[rws_53]

I experienced this recently when I tried to put the steel breech from the ccs (rear location) onto a 1322 (front).  I drilled the front hole in the breech only to realize that it wouldn't work (no recessed space for the screw head).  Do I have to drill & tap a hole at the rear location?  Or just drill a hole (and if so, any idea what bit to use)?

countersink it with either an end mill or a drill bit

[fasteddy]

If I tap it, I will use probably use a 4-40 and get a new screw.  It just seems like the tube wall is so thin that there isn't much room to draw threads on it.

When I looked at the front hole I drilled, it lined up, but there didn't look like there was enough headroom between the front of the hole and the top of the breech to fit any kind of countersink bit (and I'd have to buy one for steel anyways).