Grum87 Posted March 19, 2016 Report Share Posted March 19, 2016 A little background first - Brass is Federal 7-08 FL sized down to 260rem, then trimmed to length, chamfered inside and out. No neck turning, and no other work done to the brass. Load is a 120gr Nosler BT over 43.8gr of H4350 all over a KVB7 - so not exactly hot stuff. And being honest, everything I've fired through it also does it. The load shoots well, and there are no signs of pressure or anything else to worry about - and being honest these marks don't worry me - I'm more curious than anything. Should I be turning the necks down for these? Or is it perhaps something to do with how the chamber has been cut? It is a factory Remington chamber, so nothing would surprise me, aswell as it does shoot..... Link to comment Share on other sites More sharing options...
Andrew Posted March 19, 2016 Report Share Posted March 19, 2016 If you can beg a round of factory 260 and fire it, you'll know if it's the chamber or the resizing.....~Andrew Link to comment Share on other sites More sharing options...
Grum87 Posted March 19, 2016 Author Report Share Posted March 19, 2016 I don't know of any shops that stock 260rem let alone anyone shooting factory stuff through theirs...... Link to comment Share on other sites More sharing options...
BlueBoy69 Posted March 19, 2016 Report Share Posted March 19, 2016 Lapua make 260 Remington cases (link), so it shouldn't be that much trouble? Hannam´s Reloading Ltd is a Lapua distributor. Spud1967 lists them too (link). I'm sure other shops can get them. Link to comment Share on other sites More sharing options...
jcampbellsmith Posted March 19, 2016 Report Share Posted March 19, 2016 I got 260 Rem ammo from the Sportsman Gun Centre - 120 gr Remington Accutip. Regards JCS Link to comment Share on other sites More sharing options...
phaedra1106uk Posted March 19, 2016 Report Share Posted March 19, 2016 I have some new Remington 260 cases, PM your address and I'll send you one to try so you can see if it's the chamber causing the problem. My Tikka T3 in 260 certainly doesn't cause it using either new Remington 260 or re-formed 308 RWS brass. Link to comment Share on other sites More sharing options...
brown dog Posted March 19, 2016 Report Share Posted March 19, 2016 A little background first - Brass is Federal 7-08 FL sized down to 260rem, then trimmed to length, chamfered inside and out. No neck turning, and no other work done to the brass. Load is a 120gr Nosler BT over 43.8gr of H4350 all over a KVB7 - so not exactly hot stuff. And being honest, everything I've fired through it also does it. The load shoots well, and there are no signs of pressure or anything else to worry about - and being honest these marks don't worry me - I'm more curious than anything. Should I be turning the necks down for these? Or is it perhaps something to do with how the chamber has been cut? It is a factory Remington chamber, so nothing would surprise me, aswell as it does shoot..... Are you using a redding competition neck sizing die? Link to comment Share on other sites More sharing options...
Grum87 Posted March 19, 2016 Author Report Share Posted March 19, 2016 Lapua make 260 Remington cases (link), so it shouldn't be that much trouble? Hannam´s Reloading Ltd is a Lapua distributor. Spud1967 lists them too (link). I'm sure other shops can get them. 80 odd quid or more per 100 brass is a very expensive way to find out....and even at that, Lapua brass is so ridiculously tight necked I'd ordinarily size it before its first loading. So that may not tell what the issue is. Are you using a redding competition neck sizing die? No, just a plain old redding FL die Link to comment Share on other sites More sharing options...
IanM Posted March 19, 2016 Report Share Posted March 19, 2016 Is it not something to do with the chamber cut like that to show the case is from either a civilian rifle or a military rifle, I can't remember which? Sorry. Link to comment Share on other sites More sharing options...
Grum87 Posted March 19, 2016 Author Report Share Posted March 19, 2016 Is it not something to do with the chamber cut like that to show the case is from either a civilian rifle or a military rifle, I can't remember which? Sorry. If it were a Russian made rifle I'd agree with you Rifles built for the civvy market in Russia are chambered in such a way it makes brass similar to this. Link to comment Share on other sites More sharing options...
Grum87 Posted May 12, 2016 Author Report Share Posted May 12, 2016 Never got to the bottom of this, happened with proper 260 brass also. Cross section of the chamber coming when I pick up my rifle from being re--barrelled in the near future...... Link to comment Share on other sites More sharing options...
gun nut Posted May 13, 2016 Report Share Posted May 13, 2016 Has to be the way the chamber is cut Grum87. If it was the resizing causing it it'd be there before you shot it not afterwards. Link to comment Share on other sites More sharing options...
17 Rem Posted May 15, 2016 Report Share Posted May 15, 2016 Redding S type die used by any chance? Link to comment Share on other sites More sharing options...
Grum87 Posted May 15, 2016 Author Report Share Posted May 15, 2016 Standard Redding neck sizing die with a carbide button. Link to comment Share on other sites More sharing options...
Grum87 Posted May 15, 2016 Author Report Share Posted May 15, 2016 Pete at PJS Precision kindly sectioned the chamber during my semi-custom build. Link to comment Share on other sites More sharing options...
Chris-NZ Posted May 15, 2016 Report Share Posted May 15, 2016 Good old Rem quality control Link to comment Share on other sites More sharing options...
Grum87 Posted May 15, 2016 Author Report Share Posted May 15, 2016 Aye, it shot pretty well being fair to it, but as with anything mass produced, you pay your money and you take your chances...... Link to comment Share on other sites More sharing options...
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