The 22CM belonged to a buddy. He didn't keep a data book round count but judged round count by the number of missing bullets from those dedicated to the barrel. Of course, all I've ever heard was the 22-250 is a barrel burner but I have one that still shoots minute of prairie dog after what I am sure is at least 2,500 rounds. It has been mine for 20 years now. For the first few years I went twice a year for 3-5 days of shooting and it was my main rifle on some very crowded dog towns. It shot under 1/2 MOA at the beginning and still holds just under 3/4 MOA today.
I've put a few hundred rounds through a 22xc. In my limited experience with a 14tw 22xc it is in a class above the 22-250 and the 220 Swift. I love them both, but if I ever shoot the barrel out of my Swift I'll replace it with a 22xc. As far as barrel life ...... who knows. That would be an endless debate and maybe no definate answer. I think a cool burning powder similar to AA2700 would help extend the barrel life, but that is just a guess on my part.
How does the 22xc exceed the swift by 200fps? I thought the swift had at least equal powder capacity.
I'm not sure how it did it for sure. Cartridge efficiency, barrel maker difference, powder charge.(??) I'm not a ballistics expert, nor did I have it long enough to give more definitive data . I wish I could. The rifle was loaned to me for about 3 weeks while a friend who owned it was in the hospital and recovering. He sold it about a month later. It was smithed by a fellow in Kenosha, Wisc.
Urban -
Late response but called Tubb, they said nosering tool will be available in a month and cost $800!!!
Surely that will include some of his magic dust.
