Albert 888 Posted March 28, 2015 Report Share Posted March 28, 2015 OK I have a rcbs 3 carbo die set For 38/357. Rn,swc,wc. Bullet seater, f/l sizer and a third one for belling the brass. Whats the third one actually for,I can see what it does but why would I want to bell the neck. In laymans terms please. I understand the abbreviations as in round nose,semi wad cutter, wad cutter and carbide. Cheers Albert Quote Link to comment Share on other sites More sharing options...
Amazed Posted March 28, 2015 Report Share Posted March 28, 2015 OK I have a rcbs 3 carbo die set For 38/357. Rn,swc,wc. Bullet seater, f/l sizer and a third one for belling the brass. Whats the third one actually for,I can see what it does but why would I want to bell the neck. In laymans terms please. I understand the abbreviations as in round nose,semi wad cutter, wad cutter and carbide. Cheers Albert For seating cast boolts I think. Quote Link to comment Share on other sites More sharing options...
Albert 888 Posted March 28, 2015 Author Report Share Posted March 28, 2015 It has a sizer expander bobbin inside,like a full length sizing die but it's closer to the shell holder end of the press. I put a empty case in the press and bells the end out like a trumpet. Quote Link to comment Share on other sites More sharing options...
rem708 Posted March 28, 2015 Report Share Posted March 28, 2015 As per the majority of pistol cartridges the walls of the case are parallel. The majority of loaded ammunition is a plain lead bullet which is bigger than the inside diameter of a sized case. If you were to seat this it would shave lead off the bullet. The case is belled out to stop this! Once seated you use the crimp die to take this belling off. If you so wish you can add extra crimp to hold the bullet but this is normally unnecessary as the case tension holds the bullet firmly. The constant belling and excessive crimp causes the mouth of the case to split and fail prematurely so use the minimum of both. Oh were the days when I loaded 1000+ a week Quote Link to comment Share on other sites More sharing options...
Underdog Posted March 28, 2015 Report Share Posted March 28, 2015 For cast bullets mate. You don't really need to bell the case mouth loads. Adjust it so it when you hold the case up to the light you can just see the case mouth spread a little. Some jacket bullets have no or little bevel at their base, it can aid feeding them in the case too as the brass is thin at the mouth. U. Quote Link to comment Share on other sites More sharing options...
Vince Green Posted April 1, 2015 Report Share Posted April 1, 2015 A slight flare on the case mouth to make seating easier and prevent bullet damage Quote Link to comment Share on other sites More sharing options...
Albert 888 Posted April 1, 2015 Author Report Share Posted April 1, 2015 Cheers guys,the die must have been set up wrong when I got it. As it over flared it. As said I don't need it for jacketed heads as they go for n a treat. I have loaded about 400 cast head so far after full length sizing and it does shave a smidgen of whilst seating if not bob on. Thanks for the info. Quote Link to comment Share on other sites More sharing options...
Underdog Posted April 1, 2015 Report Share Posted April 1, 2015 Most cast bullets are .002" up on bore size. Where as your jacketed are .357" a cast bullet may be .358-9". That is when the expander/flaring die comes into play. U. Quote Link to comment Share on other sites More sharing options...
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