Thread: 284 win slow speeds

Originally Posted by Jim356

Yes gunworks did the reaming. From what I can tell when measuring the brass it does seem to be just a fraction wider at the very base of the neck. What did you find to be the ideal neck clearance with your 284 @GWH?

That Gunworks reamer, if the same one, does have a .317 dia on the neck, it also has different lead angles than normal i believe, I remember Robbie telling me about it at the time.

I found that 3 thou total wasnt enough. I also found the neck to be wider at the bottom of the neck, by the shoulder junction, a neck turn to increase clearance, and make sure that it cuts down into the shoulder a little prevented donuts at the neck/shoulder junction and stopped me seeing pressure signs at lower powder changes than expected.

I think im at 5-6 thou clearance, and it was much happier.