Pre-fit Lemmon? What’s your thoughts

[Teekerguy]

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.

That what I did with my 280ai but I just think what's confusing me is my 223ai was load, shoot, formed cases no problems at all no false shoulder no jamming the bullet but I had a solid smith spin that up for me

 

[bluedog69]

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.

Sorry to bother but I am a learner.
The only AI I have been around was my friends 257 Roberts back when we were in high school.(40 years ago) He would buy factory rounds which chambered pretty hard and shoot them to fire form his brass.
I assume this is what you are implying with negative head space?

 

[Shane Lindsey]

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

I would not be next to him when he is doing range sessions with anything he produced...definitely wouldn't shoot anything he rolled...

 

[Teekerguy]

I would not be next to him when he is doing range sessions with anything he produced...definitely wouldn't shoot anything he rolled...

Already ahead of you on that recommendation haha!