Bleeh Posted March 8, 2009 Report Share Posted March 8, 2009 As far as I know, Subsonic Shotgun cartridges have a different mix of powder, to make them burn less (hence, shot goes under the sound barrier). I was wondering how easy it would be to produce you're own subsonic .410 cartridges, as I'm paying £6 a box at the moment, and I feel sure it could be done cheaper. Quote Link to comment Share on other sites More sharing options...
Paladin Posted March 8, 2009 Report Share Posted March 8, 2009 Hi . Have you reloaded shot shell cartridges before? If you have you will know it makes sense to reload .410 because of the high initial cost per box, if not check out Ian Charlton at Clay Game Reloaders www.claygame.co.uk an excelent place for or your reloading components, equipment and data. Quote Link to comment Share on other sites More sharing options...
Bleeh Posted March 8, 2009 Author Report Share Posted March 8, 2009 i was more wondering how easy it is to get hold of the sub-sonic mix? - if that's how cartridges are made subsonic in the first place... Quote Link to comment Share on other sites More sharing options...
pat 1 Posted March 8, 2009 Report Share Posted March 8, 2009 I think subsonics just use smaller ammounts of powder but not sure.Have a read through this forum and send them a question.They seem to be well into their reloading. http://www.shotgunworld.com/bbs/viewforum....a8e91806472675d Pat Quote Link to comment Share on other sites More sharing options...
Mec 9000 Posted March 8, 2009 Report Share Posted March 8, 2009 Subsonic is below the speed of sound and is a term used when a cartridge is around 1000fps still makes a bang though and can still have some kick. With moderated rifles you do not get the bang with subsonic ammo but will with supersonic through moderator. tends to be used in shotguns to reduce sonic crack where noise pollution is a problem. several ways to reduce speed, less powder, weak crimp, weak seals. reducing powder but making it harder for the pressure to release can cause problems so stick to tried and tested formulas for safe pressures. Primer brissance, powder burn speed and load weight all contribute to a safe or unsafe load for the gun you use. Gerry Quote Link to comment Share on other sites More sharing options...
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