Help with this box of ammo

[schotzfyred]

I've had this box of 30-06 Frontier Cartridges longer than I can remember..late 60's early 70's ?
I believe, and have read that Frontier [Hornady] used re-claimed military brass and loaded their own bullets in the cases and sold them as Frontier before Hornady became a cartridge company.
The head stamps of the cartridges in this box:
TW 52, 53
LC 54
SL 54 55
RA 55
TW 53
FA 55
PA 55

And one cartridge with a TW 42

Can anyone ID the head stamp companies?

 

[badkarmamib]

All I can do is the easy one, LC=Lake City

 

[243winxb]

http://www.cartridgecollectors.org/headstampcodes

I dont see the "PA 55" ?

 

[jdh]

TW Twin Cities Ordnance Plant, Minneapolis, MN
SL St Louis Ordnance Plant, St Louis, MO
RA Remington Arms Co., Bridgeport, CT
FA Frankford Arsenal, Philadelphia, PA