I’ve been meaning to update the relative rarity status for a bunch of 300 BLK headstamps. here is a rundown of what is now out of production, and what is hard to find even though all of these are from the past 5 or 6 years:
FLA - “Firing Line Arms” (I think). This was one of the earlier custom headstamps and was used by Lehigh for a time, but not too many of them were ever made, and they have all disappeared. Basically impossible to find now
SCO - “Silencerco” - There was a decent amount of this loaded & marketed as part of their “Harvester” line of ammo a few years ago, but it has all dried up and can’t be found anywhere now.
PWS - “Precision Weapons Systems” - Similar to FLA, they had one run of brass done and loaded a bunch up for sale as an accessory to their line of guns, but then did not continue production after the one run of custom brass. Is now impossible to find via retail sale anywhere.
Remington “Hog Hammer”. This one is the basic R-P headstamp, but is on nickeled brass. The nickeled brass from Remington in .300 Blackout only appeared as part of the Hog Hammer line which seems to be now defunct. This load can only be found via resale on Gunbroker these days, with none left with any online retailer.
Gorilla Silverback nickeled. This one only just came out a couple years ago, but they have already changed their production for this line of Silverback ammo in .300 BLK to regular brass. The nickeled brass version of their GORILLA headstamp is now a rarity with little remaining in online retail.
OATH - OATH Ammo is now out of business for good, and this custom aluminum case will disappear from online retail sources by 2018 (if it hasn’t already)
PNW Arms - PNW Arms has been out of business for at least a year now, but they did make a relative ton of this ammo. Whatever stocks of ammo are with retailers now are finite, and this stuff should all eventually disappear during 2018.
Prograde - Prograde went out of business a couple years ago and this headstamped brass is a finite commodity. It sometimes appears as bagged empty brass from various small online retailers.