Boogie Posted March 6, 2013 Report Share Posted March 6, 2013 How do you tell what chamber size a gun is? Is it stamped on the barrel or do you need to stick a measuring tape down the breech and measure? I am interested in a Beretta 302, most I think are 2 3/4 inch but some are 3 inch. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
sc0tt Posted March 6, 2013 Report Share Posted March 6, 2013 Should be stamped on the barrell Quote Link to comment Share on other sites More sharing options...
Paul223 Posted March 6, 2013 Report Share Posted March 6, 2013 Yeah stamped on barrel, usually something like 12/70, which means 12 bore 70mm (2 3/4 inch) chamber, 20/76 would be 20 bore 76mm (3 inch) chamber. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted March 6, 2013 Report Share Posted March 6, 2013 stamped on barrel. Quote Link to comment Share on other sites More sharing options...
Sx3 clay breaker Posted March 6, 2013 Report Share Posted March 6, 2013 I know a mate of mine said his was 3 inch chamber but 23/4 barrel Quote Link to comment Share on other sites More sharing options...
Boogie Posted March 6, 2013 Author Report Share Posted March 6, 2013 Thanks for the speedy replies. To follow up, I want this gun for the ducks, so I want to put 3 inch steel through it such as Gambore Mammoth 3" Magnum Steel Shot 3 shot 36 grammes, they state on this cartridge that the gun should be proofed to 1370 bar. I believe modern Berettas are proofed for this, but can you tell me if a Beretta 302 would be? I dont yet have the gun so I cant look at the barrel to see what it says, but if you could tell me what to look for, I can ask the owner to check. Thanks again. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted March 6, 2013 Report Share Posted March 6, 2013 most likely not proofed for 1370bar. but i would actually read the proof marks. as may have been re-proofed at some point. it wouldnt be unusual. Quote Link to comment Share on other sites More sharing options...
Paul223 Posted March 6, 2013 Report Share Posted March 6, 2013 get the seller to take some photo's of the proof marks and forward them to you Quote Link to comment Share on other sites More sharing options...
marc147 Posted March 6, 2013 Report Share Posted March 6, 2013 (edited) I don't know much about this but when I bought my 303 I was told it was made before they started stamping the steel proof mark (fleur de lis I beleve) on them. But I would be fine with steel shot if I didn't use any thing tighter than half choke. I havn't tried steel through it yet though. Maybe they just really wanted to sell me a gun!!! Edited March 6, 2013 by marc147 Quote Link to comment Share on other sites More sharing options...
Wildfowler12 Posted March 6, 2013 Report Share Posted March 6, 2013 (edited) None of the beretta a301/02/03 are proofed for HP steel shot (1370bar proof). You can however use up to 32g of standard steel, shot size 4 or smaller providing the choke is no tighter than half. This will limit the species and range you can 'confidently' shoot at though. (That's confidence in the cartridges ability to kill cleanly and effectively) Edited March 6, 2013 by Wildfowler12 Quote Link to comment Share on other sites More sharing options...
TIGHTCHOKE Posted March 6, 2013 Report Share Posted March 6, 2013 I don't know much about this but when I bought my 303 I was told it was made before they started stamping the steel proof mark (fleur de lis I beleve) on them. But I would be fine with steal shot if I didn't use any thing tighter than half choke. I havn't tried steal through it yet though. Maybe they just really wanted to sell me a gun!!! I'm afraid you will need to BUY some steel cartridges rather than pinching them! Quote Link to comment Share on other sites More sharing options...
chrispti Posted March 6, 2013 Report Share Posted March 6, 2013 Although steel is the cheapest non toxic shot, its not the only one available.... Quote Link to comment Share on other sites More sharing options...
marc147 Posted March 6, 2013 Report Share Posted March 6, 2013 I'm afraid you will need to BUY some steel cartridges rather than pinching them! Yes I am a plonker I will go and fix it. Quote Link to comment Share on other sites More sharing options...
kamikazepigeon Posted March 8, 2013 Report Share Posted March 8, 2013 i use a urika with gamebore mammoths 36g 3s that say that and my gun not proofed to 1370bar however i rang gamebore and asked what the working pressure of that particular cartrige and they told me it had a working load of 850 bar rand the proof house and explain to them and they said that my gun will be fine been using them all season with no problems Quote Link to comment Share on other sites More sharing options...
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