not all the parts are in for this project rifle, but just couldn't wait
5 rounds of Russian surplus silver tip
first round - this modified Finn trigger came all the way back to the end of the trigger guard, pinched my finger - needs a new trigger, but I have one in my parts collection
also, the action worked fine after firing this modern steel core surplus ammo, in a "D" marked '27 Sig barrel
no scrapes on the case or tear marks from the extractor
second round - hear a "ping" as the front barrel band comes off - don't have the barrel band screws yet.
3rd round - in my sight picture, I watch the upper handguard come off and fall on the ground - both barrel bands came off in recoil
4th and 5th rounds go well - then scrub down the hot barrel with Ballistol - as you know, this Russian surplus is corrosive!
LOLLL - at least it didn't blow the old Sig barrel with the first rounds of Russian surplus ammo!!!
Old Man on the Mountain