3" shells in 2 3/4" gun and proof marks???

[cyclonebri1 8]

I was looking at this on a few yankee sites the other day and of course the resounding answer is NO

 

But of course many have and have had no issues, luckily, and it is a very simple mistake to make if you have guns chambered for both lengths.

 

But over here we have 3" cartridges that have a shortened out case, ie the crimp over is less, making them equivalent to a 2 3/4" shell when spent.

 

 

So what's the feeling about these in a 2 3/42 gun?, or are the chamber pressures still likely to be an issue.

 

 

The route of this is that I always have a handfull of BB and AAA shells in 3" of the type I mentioned, in my shooting bag, just in case. Only issue is I now have is my 2 rough shooting guns are magnum rated but in 1 of each length.

Edited January 8, 2013 by cyclonebri1

[Ratsmasher 36]

I wouldn't mate, im not an expert on proofing and all that but there will be a reason for the chamber length and things like that can be nasty.

have a look at these

they're 2 3/4 " carts that would do a fox expensive though

RC do a 36 3shot 2 3/4" cartridge that I once shot a fox with and it worked

[cyclonebri1 8]

I wouldn't mate, im not an expert on proofing and all that but there will be a reason for the chamber length and things like that can be nasty.

have a look at these

they're 2 3/4 " carts that would do a fox expensive though

RC do a 36 3shot 2 3/4" cartridge that I once shot a fox with and it worked

 

No, I wouldn't do it either, not intentionally that is, :icon_redface: , The safe answer has to be to dump the 1/2 doz 3" shells I have and get a few 2 3/4's.

 

Does anyone's local dealer keep split boxes of say BB and AAA?, don't want to spend £25 a box when I only want 3 or so.

 

Why is all the good stuff like those in the link only ever available in the states :whistling:

 

Just checked the barrel markings on the O/U;

 

have 78.5 with a star over stamped in the area of the chamber of each barrel

 

1400gmos

1200Kp/cm

and finally 12-70

 

I guess the last bit confirms it as a 12 guage 2 3/4" chambered gun?, but the other figures ie 78.5??????

 

And do the pressures equate to a magnum proofed gun??

Edited January 8, 2013 by cyclonebri1

[air gun ant 1,666]

I had some 2 3/4" RC50gr 0s and they are more than enough for fox and not that expensive I don't think? About £7-£8 for a box of 10?

[cyclonebri1 8]

Anyone help re the proof marks??

[Ratsmasher 36]

dunno about the first two but someone probably will and your right about the last one

[SNAP SHOT 194]

You would need to know the gun maker, and origin of proof house to make sure of the markings, or once you know gun maker,

and where they are made, you could do a search that way, 78.5 is more than likely cm so means you have a 30 inch barrel on your shotgun,

 

i think the star is also a proof mark for belgium proof house, and you should have letters with it also...

 

hope this helps

 

 

Snap.

[SNAP SHOT 194]

And NEVER put a 3 inch in a 2 3/4 gun, your asking for trouble, or even looking to meet your maker...

 

safe hunting.

 

Snap.

[cyclonebri1 8]

You would need to know the gun maker, and origin of proof house to make sure of the markings, or once you know gun maker,

and where they are made, you could do a search that way, 78.5 is more than likely cm so means you have a 30 inch barrel on your shotgun,

 

i think the star is also a proof mark for belgium proof house, and you should have letters with it also...

 

hope this helps

 

 

Snap.

 

I miss read the 78.5, it's actually stamped 18.5, and refers to the actuall barrel diameter.

 

Now from my younger days I thought that a standard chamber was 900kp... and a high pressure or "magnum", 1200kp...??

 

Am I anywhere near?.

 

Yes, the whole issue here is to avoid any possibility of using the wrong length shell? I was just hoping the "78.5" was chamber length, wrong.

 

Will have to search out 2 3/4" bb shells

 

But anyone comment about the type of shell with a very short crimp?, and a wad holdinging down the shot. It's obviously designed to carry a heavy load but in a shorter chambered gun.

 

I only ask as the last batch of aaa's I had were that type

 

I think this is the 1st non 3" chambered gun I've had, hence my confusion

Edited January 10, 2013 by cyclonebri1