super sharp shooter Posted October 2, 2012 Report Share Posted October 2, 2012 I am going to try some rto finishes on my 3.5". My question is do I need to change my recipe or can I keep the same one with a star crimp Thanks SSS Quote Link to comment Share on other sites More sharing options...
UK fowler Posted October 2, 2012 Report Share Posted October 2, 2012 I am going to try some rto finishes on my 3.5". My question is do I need to change my recipe or can I keep the same one with a star crimp Thanks SSS you will get a drop in speed and pressure there is a lack of data for rto finished shells in 31/2" the old charlton CSBO load shot well though it never made the claimed 1500 fps more like 1350 I have the odd 11/2oz load for STEEL POWDER but not for 381 if anyone has any data for the above thats been to the proof house I would also be interested as I have 20lb of 381 and 20kg of BBB that need loading up Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted October 2, 2012 Report Share Posted October 2, 2012 A rolled turn over uses up less of the hull than a crimp so you may have to put a longer wad in to make it all fit properly stoopid underlining Quote Link to comment Share on other sites More sharing options...
kent Posted October 2, 2012 Report Share Posted October 2, 2012 so why cant you just trim the exess length of case? surely this would bring all back in order for a RTO? Quote Link to comment Share on other sites More sharing options...
sitsinhedges Posted October 2, 2012 Report Share Posted October 2, 2012 (edited) so why cant you just trim the exess length of case? surely this would bring all back in order for a RTO? You can it just wont be a 3 1/2" case anymore, will it Edited October 2, 2012 by sitsinhedges Quote Link to comment Share on other sites More sharing options...
kent Posted October 2, 2012 Report Share Posted October 2, 2012 You can it just wont be a 3 1/2" case anymore, will it Neither is an unfired crimped one 3 1/2" so what point are you making? Are you telling me that the length of plasic left behind makes a difference? Quote Link to comment Share on other sites More sharing options...
tigger Posted October 3, 2012 Report Share Posted October 3, 2012 I rto all my loads now I much prefer it to the crimping nowadays I'm using 41grains Alliant steel federal primer 1/ 1/2 of bb's I'm getting approx 1400fps not much walks away from them on the wash.... Quote Link to comment Share on other sites More sharing options...
super sharp shooter Posted October 3, 2012 Author Report Share Posted October 3, 2012 What pressure are you getting. Quote Link to comment Share on other sites More sharing options...
Guest cookoff013 Posted October 3, 2012 Report Share Posted October 3, 2012 the total lengh of a fired hull must be less or equal to the length of the chamber. as for regarding pressure loss due to roll turn, depends on the original pressure of the load. if you roll turn any cartridge thats already low pressure, its going to end in tears. i`ve made several lemons. shot just crawled out the barrel. durty little blighters. if the original load is approx 13000psi, i cant se it being bad, as this is high so can be classified as HP cartridge and has different proof pressures. about 15000psi max pressure. 13000psi is hot enough not to suffer from poor ballistics from low pressure. also the load is 1.5oz of shot, so it is a large payload, so there is no problem ! cook. Quote Link to comment Share on other sites More sharing options...
tigger Posted October 3, 2012 Report Share Posted October 3, 2012 What pressure are you getting. Well the crimped load at 39gr is 13,300psi so my load is certainly nothing to be concerned about that's for sure...... Quote Link to comment Share on other sites More sharing options...
pestcontrol1 Posted October 3, 2012 Report Share Posted October 3, 2012 you will get a drop in speed and pressure there is a lack of data for rto finished shells in 31/2" the old charlton CSBO load shot well though it never made the claimed 1500 fps more like 1350 I have the odd 11/2oz load for STEEL POWDER but not for 381 if anyone has any data for the above thats been to the proof house I would also be interested as I have 20lb of 381 and 20kg of BBB that need loading up So the load that i have been looking at which is from c&g data sheet (41gn csbo bpd multi-metal wad 42g steel @1529 fps rto card 775.40 presure )( over cip max) dose not do what it says on the tin speed wise ?? Quote Link to comment Share on other sites More sharing options...
UK fowler Posted October 3, 2012 Report Share Posted October 3, 2012 So the load that i have been looking at which is from c&g data sheet (41gn csbo bpd multi-metal wad 42g steel @1529 fps rto card 775.40 presure )( over cip max) dose not do what it says on the tin speed wise ?? I have one of the first c&g disks the load reads as 31/2" ched case +primer 43grains csbo tps/cgr350 wad 42grams steel shot clear over shot disc rto @1500+ .this load runs at 1380/1410 fps and is hot this load has been double checked a few times (by other reloaders ) and always falls short of what is says on the tin . cip for 31/2" is 1050bar Quote Link to comment Share on other sites More sharing options...
pestcontrol1 Posted October 3, 2012 Report Share Posted October 3, 2012 the above load in my post is off one of there new data sheets and is 2gn les powder and a different wad and the same shot weight and speed . what sort of fps can you get from a 3/1/2" steel or would it be best to get another powder for my steel shell Quote Link to comment Share on other sites More sharing options...
UK fowler Posted October 4, 2012 Report Share Posted October 4, 2012 the above load in my post is off one of there new data sheets and is 2gn les powder and a different wad and the same shot weight and speed . what sort of fps can you get from a 3/1/2" steel or would it be best to get another powder for my steel shell the TPSwad and the multimetal you can interchange there made in the same mould just the plastic is less flexable in the multimetal also dont get to hung up on speed large shot like BBB/4.75MM shifting at a gen 1350fps will hammer any goose Iv used the 43grain load for close to ten years the powder is a little dated now 381 and 380 leave it behind but it still kills well and puts game in the bag .load some up and try them befor you go out spending money on more powder good loading Nick Quote Link to comment Share on other sites More sharing options...
pestcontrol1 Posted October 4, 2012 Report Share Posted October 4, 2012 Cheers Nick for the info i have just loaded some up for the patten plate tommorow in no 1s and some bb. i will see how threy go for this season might have a change for the next season atb ben Quote Link to comment Share on other sites More sharing options...
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