This is the second time I have dropped off the chair after reading Tinker's postings!!!!!

You need to go live and beat out Leno. No contest.

Anyway, I have several boxes of Jensen 250 gr 338 bullets, they have the small turned rings like the current North forks. Neat bullets, push them high and still have fine accuracy. Not made anymore, so I use them only for the serious elk hunting.

Am I wrong, but did not Jensen turn into North Fork????

My test proposal is just an academic exercise to see if I can duplicate OSR. Something fun to do when the snow is 3 feet deep and outdoor activities come to a halt. Fire up the shop wood stove, oil the lathe, and make chips!

Back to reality, for those owning a OSR barrel, at what point along the barrel is OSR first noticable? What is the bore diameter and wall thickness at the start of OSR? Does OSR gradualy start and become worse as we get closer to the muzzle? What is the wall thickness at the muzzle?