I’ve used shilen, Douglas, lilja, krieger, and even el cheapo Adams&Bennet. They’ve all been really good. The Adams&bennet shoots 1” groups, which is fine for me for a hunting rifle, the others shoot .5moa or better. If you get them already threaded, they usually come short chambered and need to be finish reamed anyways, so I usually just order a blank and have my gunsmith chamber thread crown and headspace it all a the same time. That way you can get the contour and length you want too.
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