Help Needed--Pressure signs WAAY early.

[DocRDS]

I have a very mild 6GT Load. 32.8 Gr Varget. I am getting pressure signs all over the place and even popped a primer.

One of the things I noticed is my round is VERY short. I engage the lands at a COAL of 2.46" with a 105 BTHP and even 109 ELD Match factory ammo looks like it is jamming in the lands. (2.56" OAL, 1.97 CBTO).

When I was first develpoing the load, called the barrel chamber and he assured me as long as it headspaces, all was well. Headspace isn't the problem, I've pulled the ejector and chambered brass fine, along with a case gauge--even fired brass fits the case gauge. That is how I found my short distance to the lands.

So I grabbed some factory ammo at the store and chambered it and it LOOKs like there are engraving marks even on factory ammo. I am not an expert reloader, so I tend to blame myself, but I cannot for the life of me figure out why I am having so much trouble with this round.

According to my book, (and various other references) Max Charge is 34.5 of Varget and COAL should be 2.540. There is no way in hell my rifle chambers that COAL without jamming into the lands. I have 32.8 and COAL of 2.46 to get off the lands. Anytime I deviate from norms gives me pause and I really could use some help.

Getting incosistent ejector swipes, 1 blown primer. SD is all over the place (I can hold 10 SD for 20 shots 6.5 Creed/ 308). Bartlein Barrel Chambered by a "good" mfgr (I'll give em a chance to fix it, if its bunk first). What do I do. I can't shoot this thing like this. 2 grains below max charge! Even for a 110grain a-tip!

Here are pics of Factory Hornady ELDM 109s chambered with what I think are engraving marks:

 

[Bacarrat]

I had the same exact issue with my 300NM barrel. Freebore was cut too short. I had extended and it solved all the pressure issues.

 

[spife7980]

Saami shows that the freebore is .119 (=1.866-1.747)
Ask the smith for a copy of his reamer print and verify its saami if you are shooting factory ammo.

Are the marks all the way around the bullets circumference or are the marks actually coming from scraping on extraction under a spring ejectors force? Remove the ejector and see if they still show up.

Also, what are your velocities? Do they correspond with high pressure? Clean your barrel while you are at it.
What action, does it have a small firing pin that allows it to do the high pressure small rifle primer cases? Or is this on an unbushed rem700?

 

[DocRDS]

Yes, 360 degrees of marks. Looks very similar to when I was jamming my handloads in.
Impact 737 Short Action New this year.

Velocity is about 100FPS high 2900FPS but I am shooting a 28" barrel. (again 32.8 gr varget, 105 Hornady BTHP).

I'm gonna hit it with some CLR to see if there is carbon buildup. I have about 100 rounds since cleaning.

 

[DocRDS]

Thorough Cleaning. Still Marking up factory ammo. Something ain't right here. My Spidey sense was going nuts when I had to seat super short.

THinking its going to a gunsmith for assistance. I like having fingers and try not to chase velocity, popped primer and ejector swipes is bad mojo. Also had a bit of a carbon ring on the bolt (in the shape of a primer). Prior to today I had maybe 100 rounds since last cleaning and that bolt face was shiny because OCD.

 

[secondofangle2]

What are the credentials and reputation of the person who chambered this?

There are a lot of backwoods Bubba’s that call themselves gunsmith but don’t know what the hell they’re doing

 

[DocRDS]

What are the credentials and reputation of the person who chambered this?

There are a lot of backwoods Bubba’s that call themselves gunsmith but don’t know what the hell they’re doing

Very Well Regarded and represented here. Like I mentioned, I have suspicion something is wrong and everyone is allowed an "oops" once in a while. It also could be my dumb ass although the evidence is pointing away--that's kinda why I got so far before pulling the plug--just thought I was screwing up my reloads.

I'm super conservative and try and buy from top notch people as this crap always happens to me.