cardigun Posted October 4, 2018 Report Share Posted October 4, 2018 (edited) I have been following the posts about over bored barrels and fibre wads with interest. I use a bennelli auto with 3 1/2 " chamber for pigeons, and was worried that the wads would not obturate into to barrel by the time the powder pressure was out of the case. I cut open several makes of fibre "pigeon" cartridges, and found that the Hull "super fast pigeon" cartridges had a much longer wad column than the others. It looked like they put two fibre wads between the powder and the shot. I have had to fit a slightly less powerful recoil spring in the stock to ensure full ejection. Other than that, it works fine with the Hull cartridges. Obviously no one would choose a long chambered gun for this purpose, but it happens to be the one I use on the Marsh. I have a photo of the cut open case somewhere, and will post it when I find it. Edited October 4, 2018 by cardigun Found the picture. Quote Link to comment Share on other sites More sharing options...
snow white Posted October 4, 2018 Report Share Posted October 4, 2018 Whats your point Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 4, 2018 Report Share Posted October 4, 2018 16 minutes ago, snow white said: Whats your point OK, the OP hasn't exactly crossed the 'ts' and dotted the 'is' but it's pretty obvious what he's saying, surely. Read his post again. Quote Link to comment Share on other sites More sharing options...
Diss4111 Posted October 4, 2018 Report Share Posted October 4, 2018 I have a 3 1/2" Beretta Extrema and I fire anything from 21g fibre clay loads to 66g lead loads, I have never had an issue where I have missed or winged a bird because of a bit of gas leakage. The time it takes the shot load to travel 3/4" of an inch is virtually immeasurable and irrelevant Quote Link to comment Share on other sites More sharing options...
Raw and wriggley Posted October 4, 2018 Report Share Posted October 4, 2018 I shoot clay loads through my a400 Unicom and haven’t noticed any problems Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted October 4, 2018 Report Share Posted October 4, 2018 With lighter loads, you get more space to be filled by wad rather than shot ... ergo less/no issues. The highest risk would be on heavy loads of larger shot there the space in the case is taken up by more shot / less wad. The only other thing to add, is that I expect the was to be under huge compressive forces at that point in the chamber .. therefore squished up quite a bit! Quote Link to comment Share on other sites More sharing options...
panoma1 Posted October 4, 2018 Report Share Posted October 4, 2018 This raises another question....if you fire a 2 3/4" steel/hevishot load through a 3 1/2" chambered gun, and the distance between the open cartridge mouth and the forcing cone/barrel proper isn't breached by the wad.....will the steel/hevishot damage the bore? Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 4, 2018 Report Share Posted October 4, 2018 54 minutes ago, Smokersmith said: With lighter loads, you get more space to be filled by wad rather than shot ... ergo less/no issues. The highest risk would be on heavy loads of larger shot there the space in the case is taken up by more shot / less wad. The only other thing to add, is that I expect the was to be under huge compressive forces at that point in the chamber .. therefore squished up quite a bit! Indeed. Or where you have a smaller load weight of a lighter material. I'm reliably informed that a 32g load of bismuth takes up the same volume as does 36g of lead and are readily available in 2&1/2" chamber sizes. Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted October 4, 2018 Report Share Posted October 4, 2018 35 minutes ago, panoma1 said: This raises another question....if you fire a 2 3/4" steel/hevishot load through a 3 1/2" chambered gun, and the distance between the open cartridge mouth and the forcing cone/barrel proper isn't breached by the wad.....will the steel/hevishot damage the bore? Look at shot wads ... you see that the setback forces show now marks towards the mouth of the wads ... I'm convinced we're not at risk on that one at least Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted October 4, 2018 Report Share Posted October 4, 2018 30 minutes ago, wymberley said: Indeed. Or where you have a smaller load weight of a lighter material. I'm reliably informed that a 32g load of bismuth takes up the same volume as does 36g of lead and are readily available in 2&1/2" chamber sizes. yeah. 25g steel occupies the ame volume as 32g niceshot 32g bismuth 28g pure copper shot 29g itx10 36g load shot and 42g t13 for some strange reason these stick in my memory Quote Link to comment Share on other sites More sharing options...
panoma1 Posted October 4, 2018 Report Share Posted October 4, 2018 15 minutes ago, Smokersmith said: Look at shot wads ... you see that the setback forces show now marks towards the mouth of the wads ... I'm convinced we're not at risk on that one at least Whilst I accept your point, that would be in hard plastic wads....I was thinking of steel, or other hard shot in gamebore fibre wad cups! Which are a lot softer and may break up (on exiting the cartridge and hitting the forcing cone) losing their 'totally enclosed' protection! Quote Link to comment Share on other sites More sharing options...
Smokersmith Posted October 4, 2018 Report Share Posted October 4, 2018 OK ... difficult for me to know that without you articulating it !! Point agreed .... Quote Link to comment Share on other sites More sharing options...
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