6-47L throat erosion

[4xforfun]

Well, in all my years of hand loading...with all of the various chamberings that I have shot, I have never really checked the rate of throat erosion. I am always tinkering, twisting and turning my dies, changing bullets, and for most of my chamberings have 2 or more tubes and only one set of dies for each.

Well, I only have ever had ONE 6-47L. I set it up to shoot the 108 Bergers, set the dies, loved how it shot, and never touched ANY of my dies or switched any components since day one.

I just put my 1006th round down the tube. I am going to use it as a backup for an upcoming match, so I thought I would check everything over. The best I can tell, I have roughly .090 wear (within .010). Day one measurments were simple...the lands were new and square, and getting a measurememt was simple. Now, finding and EXACT measurment is tougher because of the wear to the throat. I no longer get nice land marks on my bullets for referance....more of a ring .

Does this number jive with your numbers??

Brux 1-8
39 H4350
108 Berger BT
CCI 450

Thanks,
Tod

 

[mikecr]

Does it still shoot the same?
Any need to readjust seating? Off the lands, in the lands?

 

[r bose]

Tod, this may or may not be relevant but in my 6xc, I have 120 thousands erosion over 1267 rounds. I shoot 105 HPBT's and 105 Hybrids using RE-17 powder. I have about 550, 115 DTACS that I'm going to start using because the throat is getting to where I don't have much bullet left in the case if I'm touching the lands. I suspect that after shooting the 550 DTACS, I'll set back the barrel and start over.

Had a friend get this very same result, set back the barrel at 1800 rounds and got another 1200 out of it before it was replaced due to accuracy drop off.

 

[DHD]

Can't help witht the 6×47L yet, but my 6.5 Creedmoor's throat jumped way out there sooner than I would have liked. Accuracy remains as good as ever though. I was jamming Hybrid's and VLD's, but now can only jam VLD's using AICS magazines. I am thankful that Hybrid's like to jump.

Your load doesn't appear hot. About 2975-3025fps? Has the accuracy remained similar (I suspect it has as you did not mention it). Also, your chosen bullet likes to jump I would bet, so you have life left in it still.

 

[4xforfun]

I haven't put any rounds on paper since FOREVER ago. I thought I was showing a little more verticle on the steel lately, so I adjusted my dies to give me a "jam" again. I will test on paper before I leave for the match. If accuracy went to krap I will blame it on the longer ammo and simply set my die back to the original setting and sink the bullets in deeper.....take me 5 minutes.

I still have neck left with the extra 90 thou, but not too much more!! This gun is NOT a match gun. It is a 700 action with a rem Varmint contour tube. I have the original Sendero stock and I also have a Shehane MBR Tracker stock for it as I used to take it along to 1K matches as a backup gun/rental gun. I use this gun to plink steel. When I did the load development it was a "tac driver" ( if I did my part ;D ;D), but like I said, haven't put it on paper for a while.

I am not having any problems, nor am I worried/complaining....... just putting the info out there on the 'NET"...figured it may help someone some day.

Thanks,
Tod

 

[gmitchell]

Where is the match your going to? We have not saw you in a while.

Gordy

 

[4xforfun]

Where is the match your going to? We have not saw you in a while.

Gordy

Just going to shoot a little local 1K "F" class...the ND State LR matches over near Bismark. I am bringing Jackson along to keep me out of trouble!! I still haven't gotten the bug to compete in 600/ 1K matches. I went an entire 12 months without pulling the trigger on ANYTHING except a few of my pistols. Lately I have been banging on steel from my hunting shack. I have 15 targets out now ranging from 415 to 1730 yards.

I just figured out the hard way that I am a little rusty at the loading bench. I did some testing with my 300 WBY tubes for the upcoming match. Knowing that I was going to shoot /load a bunch, I opened up a new, untested jug of RL25. Did all of my testing and tuning with that specific can of powder. Figured I had it dailed in pretty good!! Just finished loading the 200 "match" rounds....75% of the way through I ran out of powder!?!? Here I had grabbed the OLD jug to load my match rounds!!! . I also ran out of this lot of bullets...when I started load development I figured how many I needed..... I simply counted the new boxes. I forgot that the older 215 Bergers came in boxes of 50, not 100.

So, I am going to the match with loads of untested powder, mixed lots of powder, untested bullets, untested lots of bullets, mixed lots of brass, and old brass mixed in with new, unfired brass!!!!. What the hell..Maybe Jackson will do OK!!!

 

[boltfluter]

4x,

Don't sweat the small stuff. You'll do fine. Lol. ;D

Regards, Paul

www.boltfluting.com