Recently picked up a Savage 110 fcp in 338 lapua and, after working up a satisfactory load, have droped it off at my gunsmith for an accurizing Job. (action bedding, trued action, lap bolt lugs etc.) While waiting on its return, I've been pondering the 338 lapua improved chambering. I could have my smith install a 28-30" Lilja barrel, ream it out for the improved 40 deg. sholder and fit it to the Savage receiver for a relitavely inexpensive "custom" rifle. He also has the capabilities to make dies using the same reamer and I could fire form my existing brass. I have never played with the Improved chambering and am only now starting to experiment with the lapua. I wounder if it would be worth the extra expence for the "improved" version. I like the numbers that Kirby Allen is getting out of the 338 allen xpress which, to my knowledge, is basically the same thing. Can any of you elaborate on these two chamberings? pros, cons, expence vs preformance gain etc.