saltydecimator 482 Posted March 6, 2013 Report Share Posted March 6, 2013 grenade in your hands? feasible? what say you masters of the webz??? Quote Link to post Share on other sites
theorangeplanet 968 Posted March 6, 2013 Report Share Posted March 6, 2013 That will do nothing... By the time the piston as reached that point, it has already relieved all of its pressure. It's just meant as a way of keeping the spent gasses from going all the way through the gas tube and into the receiver. If you perhaps want a slightly dirtier carrier, then block it... but it won't do diddly to increase pressure and make the shotgun cycle better. 2 Quote Link to post Share on other sites
Lone Star Arms 2,047 Posted March 6, 2013 Report Share Posted March 6, 2013 The vent is there to allow gas behind the piston to evacuate efficiently as the piston is driven back by expanding hot gas in front of the piston. Blocking the vent, or welding it up, prevents gas behind the piston from exiting at the same rate as the gasses in front of the piston are expanding, trapping gas behind the piston, and requiring a hotter load to overcome the additional resistance and cycle the action. 2 Quote Link to post Share on other sites
sapper1371usmc 107 Posted March 7, 2013 Report Share Posted March 7, 2013 Mike, thanks for clearing that up. That definition needs to be a sticky somewhere so that all the new guys contemplating this mod can re-evaluate. 1 Quote Link to post Share on other sites
saltydecimator 482 Posted March 7, 2013 Author Report Share Posted March 7, 2013 ok, thanks for the replies,i see where you are coming from.. how about making a bigger gas block with a bigger diameter piston, to allow more surface area to work? Quote Link to post Share on other sites
Lone Star Arms 2,047 Posted March 7, 2013 Report Share Posted March 7, 2013 That would increase the amount of gas and pressure needed to cycle the action. The Russian engineers got it right. Quote Link to post Share on other sites
doodi1 23 Posted March 7, 2013 Report Share Posted March 7, 2013 That would increase the amount of gas and pressure needed to cycle the action. The Russian engineers got it right. Yup. The Russian Engineers usually did a pretty good job designing things, it was the communist workers who did not give a crap about what they made that caused the problems. Well that, and um.... the Vodka did not help either. Quote Link to post Share on other sites
Trespasser 7 Posted March 7, 2013 Report Share Posted March 7, 2013 I think the best way to simulate a high brass load is to open up the gas ports. You will use more gas pushing on the piston and adding to recoil instead of pushing the lead out of the barrel. That would increase the amount of gas and pressure needed to cycle the action. The Russian engineers got it right. It would actually increase the volume of gas needed to build pressure, but take less pressure to move the larger piston (given the change in mass and friction are negligible) for an equal amount of force. Think of it as a truck with small tires versus big tires. The small tires fill faster, but the bigger tires can lose more pressure before they are flat. Quote Link to post Share on other sites
saltydecimator 482 Posted March 9, 2013 Author Report Share Posted March 9, 2013 as bill nye would say, "SCIENCE!!!!" wasnt always my thing. i just figured thst there is gotha be another way to design this thing to work with american bird shot... was smokin clays with hand thrown clays today and its just so satisfying... gun was cycling everything ( after opening 3 of 4 up to #40 drill bit) but for the timid etc, it would be nice if there was another way.... Quote Link to post Share on other sites
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