6.5x47 ignition

[brunr6mmBR]

I'm shooting a surgeon scaple tacitcal rifle in 6.5x47 with RL-15 and wolf mag primers, about one or two out of 10 rounds I'll notice a very slight delay from the time of trigger pull till the round goes off and it'll always be low at 600 yards, about 4 to 5 iches out of the group, not sure what could be causing this, if you put a empty in the chamber and pull the trigger theres never a delay, anybody have any suggestions as to what may be causing this?

 

[BHarvey]

You could be pushing the shoulder back too much creating excess headspace.

 

[280man]

Proably a primer seating issue. What tool are you using?

 

[brunr6mmBR]

I use a forester co-axial press with built in primer seater, I don't have any issues with my 308 or 6mm dasher cases. I seat the bullets into rifling so I didn't think headspace should be an issue, the primers seem to be getting hit hard, same as my other rifles, any other possibilites? Thanks for the comments so far

 

[jb1000br]

I have shot about 1500rds or so of 6.5x47 with CCI 450's and R15, and 500 or so in 6x47 and never had an issue.

Like Brian said, may be excess HS, may be deep primers, may be bad primers...or a combo of all three.

Measure fired and sized headspace and post it. Also try to measure how far under flush your primers are.

JB

 

[Moderator]

1. Is this new brass? If so check the flashholes. Some of Lapua's 6.5x47 brass had flashholes that had a small flake, like a quarter moon, which partly blocked the flashhole. You can remove this with a pin vise.

2. Are you tumbling your cases or leaving cleaning solution on the inside of the brass. A little bit of walnut residue or solvent could be affecting the primers.

3. A couple years ago Jackie Schmidt had a similar erratic problem with Wolfs. Turned out some of the primers were shorter than spec and these did not get seated properly. By shorter I mean the side dimension.

 

[BoydAllen]

Reading down the page http://www.forsterproducts.com/store.asp?pid=24822&catid=19938 it looks like that unlike other primer seating systems, the Forster is set up to seat to a specific depth, and no farther, which would make it possible to under seat a primer that was a few thousandths short. As a test, switch to using a method that allows seating to what ever depth give the best feel, and see if the problem persists. I am betting that it won't.

 

[yat3b35]

I had the same problem at one of the groundhog matches early this past spring with my 6mmbr.It acted just like a flint lock rifle , click bang. My problem was that I had pierced a primer and that is when the problem started. A small piece of primer had migrated back into the bolt and caused the fireing pin to drag just enough to delay fireing. Luck would have it that the smith that did the work on my rifle was at the match. He knew right away what the problem was. He unasembaled the bolt and flushed it out with Brake kleen , put it back together and I have not had a problem since.
Have you had any pierced primers? If so do as my smith did and see what happens.

Just an idea. John

 

[kentuckytroutbum]

I would also disassemble your bolt and check & clean the firing pin and spring. It could be that oil or grease has congealed, and is slowing down the firing pin, or causing it to hang up in some fashion.

 

[brunr6mmBR]

I did take the bolt apart and inspect it, didn't find any build up. I used a hand held primer to seat the primers with and believe this may have fixed the problem. When comparing the two after the hand held and then the forester the hand held seated the primers flush with the case, whereas the forester seated them a little deeper than the case rim, I only fired about 15 rounds this way due to the weather right now, but all seemed to fire immediately, I sure hope this fixed the problem, thanks for all the speedy replys, Jason

 

[jb1000br]

You don't want the primers flush! You ideally want them 3-5 thou under flush. I think your hand primer is worn out.

JB

 

[lmorrison17]

I am having the same problem with a batch Wolf SRM primers. A Lawton in 6.5x47 with H4350. A Rem with a Kiff bolt in 30x47 with 133 and RL10x. I tried again with both making sure the primers were WELL seated. I had some that didn't go off at all I saved these and intend to take em out and smack em with a hammer to see whats up. I tried old and new cases and head space is not an issue as my shoulders only get moved .0015. I know about the flash hole flake and those get cleared as matter of coarse with new brass prep. Deer season, work, holidays, weather interrupted my testing. I am going to try opening the flash holes on the 30 to see if that has any effect. I bought these when the CCI 450s became unobtainium. That isn't working out so well. The 30 is new so I don't know what its gonna like yet. I hear the 450s are coming back but so far someone else keeps beating me to them. BTW both of these actions consume cci fed and rem primers flawlessly.

 

[nfa1eab]

I have had the same problem with Wolf SRMs in a 6 BRX. It is not a long delay, but you can hear it. This is not a primer seating, headspace issue in my rifle. In that 600 yard prone match I lost 9 points total, all to vertical dispersion. Other than the Wolf SRMs, the prep and load generates ES=11, and SD=4. Switched to CCI 450s and problem gone. The SRMs have some ignition issues I believe. I have used the Wolfs from 2 years ago and they are fine. The problem ones have a lot # of 01-09. I have enough problems following through during prone without waiting for the primer to ignite.

 

[flatlander]

The lot(s) of Wolf SRM & LRM primers I've been using were purchased a couple of years ago when PV had 'em for $90/5M. I gave up on trying to seat them with either of my hand priming tools(RCBS & Hornady), and went back to using a RCBS Ram-Prime unit in a dedicated Partner press that gets used exclusively for this purpose.

I've had several FTFs with LRMs, but most of them were while fireforming various AI cases. Don't recall having any problems with the SRMs, which have been used in everything from 20 VarTarg to 6.5x47.

 

[dawe11]

Put together a 20 BR on a Savage PTA single shot action and wanted to use Wolf SRM primers.
Had to stop using them as every primer had a delay ignition.
After checking every thing I could think of, head space, primer depth, bolt cleanness, fire pin, etc, gave up and have used BR4 since with no problems.