Jack; 222.5 Shilen Rifle
Jack, First of all the Jacket and patches are "To Kill For" Cherish it. Now about the rifle and the caliber. There are several good articles about the 222.5 cartridge, in the Bench Rest Primer published by Precision Shooting in 1997. Essentially it was developed by pushing the shoulder back on 222 Rem Magnum brass about 1/10 inch then trimming to length. Mine is a tight neck requiring me to turn the brass to .008 thick. Depending on your chamber dimensions you can get some really long case neck lengths to play with, which results in a very wide range of bullet seating depths. I shoot H-4198 Powder between 22.0 grains to 22.7 grains using Rem 7 1/2 primers and Hornady 53 BTHP Match or Bart's 52 gr HP bullets. One of my initial 5 shot groups measured .047 with 22 grs of 4198; Hornady 53 gr BTHP Rem. 7 1/2 Rem 222 Mag Brass; shot off of a folding table using a 8.5X25 Leupold with a Varmint Hunter Reticle. Scared the hell out of me; and I'm still trying to duplicate it. The brass is easy to form, just takes time. I suspect any good gunsmith can take a standard 222 Rem. Mag die and shorten it 1/10th inch for resizing. I have an RCBS set of 222 Rem Dies shortened by a friend that will work very well. However, I use a Wilson Seater Die in .223 Rem to seat my bullets. I neck size with a Redding .223 Rem Competition Neck sizing die using a .244 bushing. Redding will make you a set of custom dies but they are pricey. I'll not get into forming the brass here, but if you need help with that you know how to find me; and I'll help all I'm capable of. You'll need something like a Skip Otto forming die to push the shoulder back that much; I do it in three steps.
Now about the rifle. The following information comes from Mikel Shilen (Ed's Daughter) at Shilen Rifles, phone
972-875-5318. Shilen started making the DGA action for public consumption in June of 1974 with serial number 101. Mikel has her Mothers DGA rifle which is serial # 100 in 222 Rem. My rifle is serial # 210 and left the Shilen plant, July 22, 1975 and is stocked with a fiber glass thumbhole stock painted brown with just a hint of gold metal flake. With the barreled action in the stock the only marks visible on the barrel is the caliber inscription: 222.5. When you remove the barreled action from the stock you should find some further markings on the bottom of the barrel just in front of the action. Mine is marked 6T75SM and deciphers as follows (according to Mikel Shilen phone conversation April 13, 2010) 6=June, T=Turks (employee who barreled the rifle)75=1975, SM= Select Match (grade of the barrel) Mikel said they quit making the DGA action rifles in 1991. The markings on your barrel are probably similar and the foregoing will give you an idea of how to interpret them. I read somewhere that Ed Shilen was a fighter pilot and flew an aircraft dubbed the DGA (Damn Good Airplane) and that's where he came up with DGA for his rifle (Damn Good Action)
I talked to Randy Robinette (Sp ?) who shot a 222.5 years ago and he said he felt safe shooting any load suitable for the 223 Rem in a 222.5. I tried Varget, Benchmark and 8208. My rifle didn't like them. Some day I'm going to try H335 because it was Walt Berger's go to powder in the 222 Rem; and maybe I'll get around to talking to Ed Shilen about what powder he shot in his 222.5
I notice where "The Chief Cook and Bottle Washer" chimed in and said he'd had a 222.5 and made the mistake of parting with it. Well, I have to confess I made a mistake with my Shilen DGA in 222.5. No, I didn't sell it, but I did have a Hart heavy varmint 8 Twist barrel in Tactical 20 made up for it, and I can assure you it's a Prairie Dogs nightmare.
But, all this has me stirred up to the point where I think I'll swap barrels later this week and revisit the
Shilen DGA 222.5
Thanks for bringing the subject of the 222.5 up and thanks to my friend Greyfox for bringing the thread to my attention. I've enjoyed this and I hope my ramblings are of help to you; and others. John Kruzan