UPDATED: 06.29.2005 -- RANGE REPORT:
-- nef factory upgrade -- barrel accessory program --
donor receiver -- new sb2-623 (.223 survivor)
caliber -- 7.62x39
barrel -- 22" -- standard contour w/nice target crown
sights -- scope rail
cartridge removal - extractor -- (.185" of case exposure)
=======================================
range report -- 06.26.2005 -- sighting in the scope
weather: 86 degrees, 70% humidity, dewpoint 73 degrees, wind 10 mph
range: 60 meters benchrest w/bipod -- 4.5x scope
ammo: wolf 122gr HP (current production - polymer coated)
goal: a "cheap to feed" 7.62x39 single-shot rifle. here are the results:
1) two boxes of wolf 122gr HP (40 rounds) -- 24 failures to fire!!
2) i still believe the accuracy for this round in a single-shot is there . . . but not today.
conclusion: today was not good for wolf ammo!
extraction did require a concerted effort, even with the poly-coat case. i was somewhat concerned about recoil with the survivor buttstock, but there was actually less recoil than anticipated.
the opinions seem to be the nef fcg doesn't have the power to work with the heavy primers -- so the cheap import ammo appears to be a no go in 7.62x39.