Spara Dritto Posted July 21, 2011 Report Share Posted July 21, 2011 Has anyone got any thoughts/ideas of how much a shotgun barrel could expand when it gets hot from frequent firing? Secondly, how this could effect shot pattern? Lastly, how does the chamber part of the barrels still fit perfectly and move freely after getting a lot hotter then the receiver in which it sits/locks into. I know I’m over thinking it but I’m just interested. Quote Link to comment Share on other sites More sharing options...
al4x Posted July 21, 2011 Report Share Posted July 21, 2011 stop thinking, you're over doing things, there will be no noticeable difference with a shotgun Quote Link to comment Share on other sites More sharing options...
poontang Posted July 21, 2011 Report Share Posted July 21, 2011 stop thinking, you're over doing things, there will be no noticeable difference with a shotgun Now, get out and shoot some pigeons Quote Link to comment Share on other sites More sharing options...
Spara Dritto Posted July 21, 2011 Author Report Share Posted July 21, 2011 (edited) I'm just curious as to the answer, it has nothing to do with my own shooting. Edited July 21, 2011 by Beretta Italy Quote Link to comment Share on other sites More sharing options...
Billy. Posted July 21, 2011 Report Share Posted July 21, 2011 I'm just curious as to the answer, it has nothing to do with my own shooting. Are you sure? I can just picture it now... MISSED! My barrels must be too warm! Quote Link to comment Share on other sites More sharing options...
Spara Dritto Posted July 21, 2011 Author Report Share Posted July 21, 2011 Haha!! not at all. Simply curiosity. I’m hoping Gordon or Dennis might be able to answer the mechanical side of things. Quote Link to comment Share on other sites More sharing options...
poontang Posted July 21, 2011 Report Share Posted July 21, 2011 Are you sure? I can just picture it now... MISSED! My barrels must be too warm! He's got to shoot at something before he can miss it Quote Link to comment Share on other sites More sharing options...
ajb403 Posted July 21, 2011 Report Share Posted July 21, 2011 When a rifle barrel heats up the bore diameter decreases as the metal expands, giving you higher pressures and hence higher muzzle velocity and a higher point of impact. The most I've had to shift a target rifle's sights to account for this is 2 minutes ie a change of 2 inches at 100 yards, this was when shooting a .308 in below zero temperatures and the barrel heats up from ~0 °C to ~60 °C (at a guess) after a few shots (those sighters did ****** all to zero in the elevation, all they did was warm the barrel!). In theory the same would be true for a shotgun, however in the real world I recon you won't notice any difference! If you're pointing it in the right direction to start with you'll hit them, if you weren't then you won't! Cheers Ashley Quote Link to comment Share on other sites More sharing options...
Spara Dritto Posted July 21, 2011 Author Report Share Posted July 21, 2011 Perfect, someone who actually gets down to the answer. Many thanks for your time abj403. Quote Link to comment Share on other sites More sharing options...
semiautolee Posted July 21, 2011 Report Share Posted July 21, 2011 bert stop worrying Quote Link to comment Share on other sites More sharing options...
Spara Dritto Posted July 21, 2011 Author Report Share Posted July 21, 2011 i'm not worrying as it's not effecting anything. I'm just curious.... I like to learn about things. Quote Link to comment Share on other sites More sharing options...
sg1 Posted July 22, 2011 Report Share Posted July 22, 2011 i'm not worrying as it's not effecting anything. I'm just curious.... I like to learn about things. THEN lol atvb sg1 Quote Link to comment Share on other sites More sharing options...
al4x Posted July 22, 2011 Report Share Posted July 22, 2011 Perfect, someone who actually gets down to the answer. Many thanks for your time abj403. he actually said the same as me in post 2 Quote Link to comment Share on other sites More sharing options...
beretta Posted July 22, 2011 Report Share Posted July 22, 2011 ive done a lot of heat shrink work over the years so not really (stand to be corrected) convinced a barrel bore would tighten. if you heat a pipe up (similar to a barrel) the bore will increase in diameter and thats a fact. it does not matter on the thickness around a hole, it will always increase. thats my take on it from an engineering point of view. Quote Link to comment Share on other sites More sharing options...
Spara Dritto Posted July 22, 2011 Author Report Share Posted July 22, 2011 Thanks beretta, although I’m still none the wiser in regards as to how the barrels don't get stiff in the receiver as they heat up and expand? Quote Link to comment Share on other sites More sharing options...
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