WinchesterDave Posted October 13, 2013 Report Share Posted October 13, 2013 Apart from 3 mils what's the difference between 65mm and 67mm carts? If you had 28g of shot in 65mm and the ssame in the 67mm case would there be any difference? Does it have less/more powder? Just curious really Dave. Quote Link to comment Share on other sites More sharing options...
Big Mat Posted October 13, 2013 Report Share Posted October 13, 2013 Could be different type of powder or a different wad, or different case. All depends on the manufacturer Quote Link to comment Share on other sites More sharing options...
Underdog Posted October 14, 2013 Report Share Posted October 14, 2013 Performance is not really affected by case length alone. I would like to know how the 67mm case came about. I get the old 2&1/2" case being 65mm and 70mm 2&3/4". Mayber there was an old 2&5/8" case ! U. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted October 14, 2013 Report Share Posted October 14, 2013 the 65mm and 67mm are classed as the same. if you check with the cip they have the same pressures etc. also if you physically measure all the hulls open, they are about 1mm short. coo Quote Link to comment Share on other sites More sharing options...
Floating Chamber Posted October 14, 2013 Report Share Posted October 14, 2013 (edited) the 65mm and 67mm are classed as the same. if you check with the cip they have the same pressures etc. also if you physically measure all the hulls open, they are about 1mm short. coo Can anyone remember when Eley Grand Prix were loaded in 70mm cases and the printing said they were safe to use in 65mm chambers? I am talking circa early 1960s. The empties would come from my Charles Partridge hammer gun, with coned mouths! Edited October 14, 2013 by Floating Chamber Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2013 Report Share Posted October 14, 2013 Can anyone remember when Eley Grand Prix were loaded in 70mm cases and the printing said they were safe to use in 65mm chambers? I am talking circa early 1960s. The empties would come from my Charles Partridge hammer gun, with coned mouths! That seems to ring a bell from the dim and distant past - back when the cartridge choice was Hobson's in nature. Could the 67mm have anything to do with the advent of plastic wads? Quote Link to comment Share on other sites More sharing options...
dipper Posted October 14, 2013 Report Share Posted October 14, 2013 When plastic cases came in they put a cork wad over the shot to take up space. Dipper. Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 14, 2013 Report Share Posted October 14, 2013 When plastic cases came in they put a cork wad over the shot to take up space. Dipper. Didn't that defeat one of the objectives of the plastic seeing as how the over shot card in a RTO could cause problems? Quote Link to comment Share on other sites More sharing options...
dipper Posted October 14, 2013 Report Share Posted October 14, 2013 Wymberley being cork it fragmented,I have always used r.t.o on my long rang l.v loads patterns just same as crimp .Have a old reloading catalogue from Allan myres most of his loads are r.t.o .Anyone have anything to add. Dipper. Quote Link to comment Share on other sites More sharing options...
Underdog Posted October 15, 2013 Report Share Posted October 15, 2013 Wymberley being cork it fragmented,I have always used r.t.o on my long rang l.v loads patterns just same as crimp .Have a old reloading catalogue from Allan myres most of his loads are r.t.o .Anyone have anything to add. Dipper. I could never find any difference with a rolled crimp. All my bp reloads have rolled crimps. Work fine for me. U. Quote Link to comment Share on other sites More sharing options...
wymberley Posted October 15, 2013 Report Share Posted October 15, 2013 Wymberley being cork it fragmented,I have always used r.t.o on my long rang l.v loads patterns just same as crimp .Have a old reloading catalogue from Allan myres most of his loads are r.t.o .Anyone have anything to add. Dipper. dipper, thanks - I didn't twig about the cork. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted October 15, 2013 Report Share Posted October 15, 2013 i crimp just because i have a crimper that works and i dont have a pillar drill. Quote Link to comment Share on other sites More sharing options...
DaveK Posted October 15, 2013 Report Share Posted October 15, 2013 Apart from 3 mils what's the difference between 65mm and 67mm carts? Dave. 67-65=2 Quote Link to comment Share on other sites More sharing options...
reggiegun Posted October 17, 2013 Report Share Posted October 17, 2013 67-65=2 Quote Link to comment Share on other sites More sharing options...
Blunderbust Posted October 17, 2013 Report Share Posted October 17, 2013 67-65=2 I wondered if someone would mention that. Quote Link to comment Share on other sites More sharing options...
WinchesterDave Posted October 19, 2013 Author Report Share Posted October 19, 2013 Yes I did realise my mathematical mistake haha! Feel very silly Now chaps, thanks for bringing that up Quote Link to comment Share on other sites More sharing options...
Blunderbust Posted October 19, 2013 Report Share Posted October 19, 2013 All in jest mate . Quote Link to comment Share on other sites More sharing options...
B525 LIGHT Posted November 3, 2013 Report Share Posted November 3, 2013 I'll ask the wife.... I got a disinterested look. Quote Link to comment Share on other sites More sharing options...
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