Guest varmartin Posted January 28, 2008 Report Share Posted January 28, 2008 I normally use Remington 17grain vmax 17HMR ammo, but have recently been using Winchester 17 grain stuff. Accuracy is on a par if not slightly better with the Winchester stuff but.... See the image below...has any one else noticed split cases ? Case measurements. ..............................................U/fired ......................................fired middle of neck..........................0.190.......................................0.191 shoulder/case junction...............0.238......................................0.241 case head/body junction............0.237.......................................0.244 Measurements taken between split cases and un-split cases vary by 0.001 Usually we all just throw rimfire cases in the bin or hedge or where ever...and not worry about what they look like. Martin Link to comment Share on other sites More sharing options...
Guest northernchris Posted January 28, 2008 Report Share Posted January 28, 2008 What rifle are you useing them in????? I had the same with Remmy ammo in my HW60. Link to comment Share on other sites More sharing options...
Guest varmartin Posted January 28, 2008 Report Share Posted January 28, 2008 My rifle is a CZ 452 Varmint. Not noticed it on any other ammo. I put it down to low Quality ammo as not all cases showed splits ? even though accuracy was still very acceptable at around the 1 inch mark @100 yards. with a 3-9 x40 scope. Martin Link to comment Share on other sites More sharing options...
kip270 Posted January 28, 2008 Report Share Posted January 28, 2008 I had loads like that when using CCI ammo, but not had any problems with the winnie ammo Link to comment Share on other sites More sharing options...
Elwood Posted January 29, 2008 Report Share Posted January 29, 2008 I regularly got split case necks with Remington 17 HM ammo. I now use Federal without any problems. Ian Link to comment Share on other sites More sharing options...
tulkyuk Posted January 29, 2008 Report Share Posted January 29, 2008 What rifle are you useing them in????? I had the same with Remmy ammo in my HW60. I used to have the same problems with HW60J - changed to feds and winchesters and haven't seen a split case since Link to comment Share on other sites More sharing options...
foxing2night Posted January 30, 2008 Report Share Posted January 30, 2008 Hi martin, I have had the odd case split now and again, Not that it causes any worry??? It,s not as if you need them to reload is it??,, As you know i use mine alot,,, The only thing that i Have done is gone onto 20 grainers for the odd fox?? If accuracy is up tp par??? Then i would not worry, One bit!!! Did hear a lot of this from a lot of lads in the states when the 17hmr first came out!! Speak soon, Darrel Link to comment Share on other sites More sharing options...
shrek Posted January 30, 2008 Report Share Posted January 30, 2008 I also have noticed remington 17,s to split in my savage, however i dont think it is brass quality between different brands as they near enough all come from the same factory, i think because 17HMR is such a dirty little round a build up of powder residue/carbon in the chamber/throat it maby a partial cause of split brass as i gave my chamber a good polish out and as yet hav not had another split case since, this may just have been a coinsidence, but i still think that the 17hmr requires harsh chamber cleaning session after each use. Link to comment Share on other sites More sharing options...
baldie Posted January 30, 2008 Report Share Posted January 30, 2008 Its a standard occurence with the .17hmr.Its a lot to do with brass quality, as basically its crap....but thats all it needs to be, as its fired once and thrown away. It will have no effect on the guns accuracy. Now you,ve gotta find something else to worry about. Link to comment Share on other sites More sharing options...
Guest varmartin Posted January 30, 2008 Report Share Posted January 30, 2008 Well I am glad a few of you HMR shooters have noticed it , Now I can rule out a baggy chamber in my 452. I was not really worried...more intrigued as to why ??? As I said..We just bin them anyway, and of `low quality brass` is all it needs to be...as baldie said . Cheers for the replies lads. Martin Link to comment Share on other sites More sharing options...
MarinePMI Posted January 31, 2008 Report Share Posted January 31, 2008 There have been a few bad lots of .17HMR floating around with insufficiently annealed necks/shoulders... Link to comment Share on other sites More sharing options...
njc110381 Posted February 2, 2008 Report Share Posted February 2, 2008 I've had a lot of splits in my 452 American. That's with Remington ammo. I've heard it's because the cases are necked down after the priming compound is added. They can't anneal the necks after because of the heat issue. I'd say 10% of mine split, although none as bad as yours. The shots still hit spot on, so I'm not too worried. Link to comment Share on other sites More sharing options...
nemasis243 Posted February 3, 2008 Report Share Posted February 3, 2008 I had the same with CCI and Remy, since using Hornady 17grn and Federal 17grn I have found that I am getting better groups and no probs with splitting Link to comment Share on other sites More sharing options...
Guest northernchris Posted February 4, 2008 Report Share Posted February 4, 2008 njc it makes sense what you are saying. Link to comment Share on other sites More sharing options...
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