Pre-fit Lemmon? What’s your thoughts

[VinceMule]

I would not cull the barrel based on the teslong inspection, I have seen MUCH worse.

I would question the sanity of a Shouldered pre fit as this is a deep discussion unless it is for a Borden, Stolle, Bat, or other top drawer custom action where dimensions are dead nuts same between various actions of the same model.

It sounds like your friend purchased a barrel headspaced for another action, screwed it on his action hoping it would headspace, but it does not.

The longitudinal splits could be from low pressure loads in a chamber with long headspace or work-hardened brass fired in another chamber.

 

[P7M13]

it literally looked like there were gouges and deep imperfections in the rifling

Have you ever looked down a Savage barrel?
I would also ask him about his fire forming technique.

 

[bluedog69]

Now we see the real problem…
Anytime an AI does that during fireforming, there is an issue with either the chamber being large, or no negative headspace and the case ruptures longitudinally as it stretches to meet the bolt face, as evidenced by the circumferential case crack.

There is much more to this story.
I would be sending that barrel back…

Cheers.

So if this were an AI pre fit with a barrel nut would you want to put the barrel on as tight as you could. (Tight on the go gauge) So that the case had less it had to stretch and reshape during fire forming?
I am just always trying to learn.

 

[hunterbob]

Buddy got a shouldered prefit in 223ai with a 1-6. It's got about 30 rounds down it. It fouled up super quick and bad using BLC-2 powder. But inside the bbl looks kinda funky to me what do you guys think. I unfortunately couldn't figure out how to upload the video but these are the best screen shots I could get. And these photos were after a couple hours of him scrubbing it with some M PRO7View attachment 624067View attachment 624070View attachment 624071

Did you try factory rounds?

 

[Teekerguy]

Did you try factory rounds?

He said he did but I'm not sure about how many he might have just done 1 and said it works lol so I'll get more details on how many

 

[MagnumManiac]

So if this were an AI pre fit with a barrel nut would you want to put the barrel on as tight as you could. (Tight on the go gauge) So that the case had less it had to stretch and reshape during fire forming?
I am just always trying to learn.

You don't use the go gauge on an AI chamber unless that is what you asked for, some have the .003"-.004" negative headspace on the go gauge, others do not.

Cheers.

 

[cohunt]

So he doesn't have the bullets jammed, he's fireforming ai brass, it was a prefit and he may not have head spaced it right, -- does he have a "crush fit" on the brass shoulder?

Sounds like maybe he should contact a smith for barrel fitting, and do more research before reloading

Unless I'm missing something, it looks like he jumped in head first rather than feet first.

 

[Shane Lindsey]

I had a few issues with fireforming and split cases. It was corrected by necking up and back down to create the false shoulder with a slight crush fit and jamming into the lands about .010". Also only a mid range load.

You can't tell until you get formed brass. Once he has that, then you will be able to tell accuracy potential. I tried hard to shoot the big pills (250 Bergers) with it, but it really would not let me, had to shoot light and fast.

 

[koja]

If the brass is good,virgin,then the chamber too deep ,rent the gauges from 4d rental and check,cheap,like $8, then go foward.

 

[Shane Lindsey]

...wait, did he not check with headspace gauges..just loaded up and let em rip???

 

[Lazy D]

What Action?
Is it a barrel nut or shouldered barrel?
How did he set headspace?
Way too many unanswered questions.
223AI shoulders are pushed back instead of blown out from a 223 Rem.

 

[sable tireur]

So he doesn't have the bullets jammed, he's fireforming ai brass, it was a prefit and he may not have head spaced it right, -- does he have a "crush fit" on the brass shoulder?

Sounds like maybe he should contact a smith for barrel fitting, and do more research before reloading

Unless I'm missing something, it looks like he jumped in head first rather than feet first.

Yes. He needs help and not from a forum. He needs a mentor.

 

[Teekerguy]

So he doesn't have the bullets jammed, he's fireforming ai brass, it was a prefit and he may not have head spaced it right, -- does he have a "crush fit" on the brass shoulder?

Sounds like maybe he should contact a smith for barrel fitting, and do more research before reloading

Unless I'm missing something, it looks like he jumped in head first rather than feet first.

That's my buddy's style unfortunately

 

[Teekerguy]

...wait, did he not check with headspace gauges..just loaded up and let em rip???

Yup it was a prefit shouldered barrel for tikka actions which to my understanding you cant adjust anyways unless a smith does it. But I did recommend getting the go and no go gauges just to double check but that recommendation was not taken