Blackhole Weaponry barrels

[Dark Helmet]

Has anyone here tried Boolits in their polygonal barrels?
http://www.blackholeweaponry.com/catalog/product_info.php?cPath=61&products_id=172

[Moonie]

with a 1-8.5" twist I'd be leary, the 300 community is moving to 1-7" as the 1-8" can have an issue with the long heavy jacketed bullets. I love my 1-8" standard rifling barrels with the heavy cast boolits.