I'd give Colt a call and see what they say...then purchase a spare or two. I'm sure they've given it a bit of thought over the years.
Don't know what the new Delta's are running, plastic guide rod? Dual spring?
Some actually thought the old plastic guide rod was a good idea since it reputedly absorbed recoil and was "sacrificial"...
I wouldn't want to second guess Wilson, but shock buff's have mixed reports...like jamming up 1911's. Probably fine for strictly range use, but I don't know, never used one.
I know it's oranges and tangerines, but I run a #22 pound spring in my 10mm Commander, and I change it out about every 750 or so rounds, whether it needs it or not, $8.99 or so from Wolff's.
The D.W. Commander has a short steel guide rod and single recoil spring.
Also, I give the gun a decent clean every 100 or so rounds, (I shoot a lot of hard cast) and generally run it a wee bit wet when I can, often putting a drop of FP10 on the rails before going out if I remember it, otherwise I make sure it has a dab of TW25b on it
Last edited by Jitterbug; 11-14-2011 at 08:23..