PotHunter96 Posted October 2, 2019 Report Share Posted October 2, 2019 Can anyone enlighten me on what the max gram cartridges I can use in my 12 bore and also the choke I can’t make head or tail of it 🤯 Quote Link to comment Share on other sites More sharing options...
Old farrier Posted October 2, 2019 Report Share Posted October 2, 2019 Maximum length of cartridge 2.1/2 inch 65 mm Quote Link to comment Share on other sites More sharing options...
Scully Posted October 2, 2019 Report Share Posted October 2, 2019 Any modern 2.5 inch cartridge. Can read the word ‘choke’ but nothing to go with it unless 36 is actually 3/6ths, (?) which would be half. Your local RFD will be able to tell you what it’s choked at. Quote Link to comment Share on other sites More sharing options...
vmaxphil Posted October 2, 2019 Report Share Posted October 2, 2019 As said 2 1/2 cartridge probably around 30 - 32g as for choke pattern it at 35 yards, if it's the size of a dinner plate it's tight size of a barn door it's open Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 2, 2019 Author Report Share Posted October 2, 2019 I can’t make anything out apart from the 2.5 inch, it’s just I have some 34 gram 67mm cartridges and I’m wondering if they’d be a bit much for it Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 2, 2019 Report Share Posted October 2, 2019 11 minutes ago, PotHunter96 said: I can’t make anything out apart from the 2.5 inch, it’s just I have some 34 gram 67mm cartridges and I’m wondering if they’d be a bit much for it Have they got any pressure limits given on the box? The 67mm is OK and your working pressure limit is 3 tons/sq". Just in case you're not aware this is not the proof pressure which would be some 25 to 30% ISH above that and you're looking for 850 bar minimum. Quote Link to comment Share on other sites More sharing options...
London Best Posted October 2, 2019 Report Share Posted October 2, 2019 And the ‘choke’ means that that barrel carried some choke at proof. There would not be any indication of how much choke. Quote Link to comment Share on other sites More sharing options...
figgy Posted October 2, 2019 Report Share Posted October 2, 2019 3 tons per square inch, should take any 21/2" cartridge you can buy. Quote Link to comment Share on other sites More sharing options...
Old farrier Posted October 2, 2019 Report Share Posted October 2, 2019 1 minute ago, figgy said: 3 tons per square inch, should take any 21/2" cartridge you can buy. If it’s in good condition and still in proof 👍 Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 2, 2019 Author Report Share Posted October 2, 2019 I will have a check on the box thanks everyone Quote Link to comment Share on other sites More sharing options...
panoma1 Posted October 2, 2019 Report Share Posted October 2, 2019 Looks like the gun was originally proofed at 13/1 (.719) or 13 (.710) under the1925 rules of proof, was reproofed in 1966 under the 1954 rules of proof at .729, for 2 1/2inch (65mm) cartridges, I wouldn’t use more than 32g game loads through it (28 or 30g would be my choice) I don’t know what the obscured marks were originally showing? be careful using 67mm HV cartridges, they can be uncomfortable to shoot due to excessive recoil, I imagine it was originally choked for game shooting. Quote Link to comment Share on other sites More sharing options...
Gunman Posted October 3, 2019 Report Share Posted October 3, 2019 The gun has at some time failed proof and the marks were defaced by the proof house. It was later repoved at 2&1/2" which equates to 1&1/8 oz load. The 30 and 36 are meaninless marks put on by some gunsmith to identfy the gun for his records , it was common practice in the Birmingham trade as the shop that had the gun may of had 50/60 guns in at a time and parts of it may have been with several diferent people at various times . . As to "choke" this relates to earlier proof and is irrelevent . What chokes it had originally and what it is now may be two diferent things and the only way of knowing is to measure it . Quote Link to comment Share on other sites More sharing options...
old'un Posted October 3, 2019 Report Share Posted October 3, 2019 (edited) What is the country of origin for the gun? Edited October 3, 2019 by old'un Quote Link to comment Share on other sites More sharing options...
ditchman Posted October 3, 2019 Report Share Posted October 3, 2019 its been re-proofed...........what is evident is the new tube diameter... .729"...........are they the original tubes or has it been sleeved.........get all that confirmed then the gunsmith will tell you what is safe to use........ Quote Link to comment Share on other sites More sharing options...
JohnfromUK Posted October 3, 2019 Report Share Posted October 3, 2019 58 minutes ago, ditchman said: or has it been sleeved When sleeved, this is marked as "sleeved" at reproof (which is obviously needed when sleeving) Quote Link to comment Share on other sites More sharing options...
ditchman Posted October 3, 2019 Report Share Posted October 3, 2019 1 hour ago, JohnfromUK said: When sleeved, this is marked as "sleeved" at reproof (which is obviously needed when sleeving) quite right.........shud have known better... Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 4, 2019 Author Report Share Posted October 4, 2019 It’s an English gun w h monk and yes it has been sleeved Quote Link to comment Share on other sites More sharing options...
JohnfromUK Posted October 4, 2019 Report Share Posted October 4, 2019 1 hour ago, PotHunter96 said: It’s an English gun w h monk and yes it has been sleeved I assume it is marked sleeved, but this is outside the area of the photo? Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 4, 2019 Author Report Share Posted October 4, 2019 7 hours ago, JohnfromUK said: I assume it is marked sleeved, but this is outside the area of the photo? Yes it is marked down each side of the barrels just above where they touch the action Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 4, 2019 Author Report Share Posted October 4, 2019 8 minutes ago, PotHunter96 said: Yes it is marked down each side of the barrels just above where they touch the action If you zoom in veryyyy close just above the where it says 12 and two and a half inch you can just about see it but only just haha Quote Link to comment Share on other sites More sharing options...
old'un Posted October 4, 2019 Report Share Posted October 4, 2019 If you do not have a chamber gauge, then your best bet is to take it to a local gunsmiths/shop and get the chamber length and chokes confirmed, having said that and looking at the proof marks of 3 ton per square inch and chamber length marked 2.1/2 inch you will be good with anything at that length and up-to 1.1/8, it will shoot nice all day with something around the 1oz mark. Quote Link to comment Share on other sites More sharing options...
JohnfromUK Posted October 4, 2019 Report Share Posted October 4, 2019 30 minutes ago, PotHunter96 said: If you zoom in veryyyy close just above the where it says 12 and two and a half inch you can just about see it but only just haha I can just make it out now you have pointed it out! Thanks. Quote Link to comment Share on other sites More sharing options...
PotHunter96 Posted October 4, 2019 Author Report Share Posted October 4, 2019 Think I’ll do that then, and yeah my normal choice is eley impax but I bought these vip elite for fox Quote Link to comment Share on other sites More sharing options...
Gunman Posted October 4, 2019 Report Share Posted October 4, 2019 If you look carefully at the photo you will see what appears to be the word sleeved stamped on the side of the barrel above the bar . This was the practice in the earlier days of sleeving .The Proof date RB is 1966 . Not quite sure when they started to stamp on the flats but it was in the mid 70'sas far as I remember . At one point in the 90's London stopped stamping sleeved for a couple of years adding a reproof mark for some reason but started again soon after . Proof houses sometimes missed marking sleeved if the joints were so good as not be seen and the submitter did not declare it as so , in an attempt to pass the gun off as original . Quote Link to comment Share on other sites More sharing options...
London Best Posted October 4, 2019 Report Share Posted October 4, 2019 I had a gun sleeved/proofed in Birmingham in 1970, and that was marked on the flats. Quote Link to comment Share on other sites More sharing options...
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