Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
i use 8208XBR and found a good load 2 gr more than my .223 and get 200+fps more with 52 gr cheek bullets. getting the .223 AI to feed from a mag is a problem. if i make another i'll use a coned bolt/chamber combo as these feed very smoothly. in general use .223 load data and increase by 1.5 gr, then buy .1 gr. excess pressure can slip up on you in this Ackley.I'm another who has begun playing the 223 AI game. Roughly how much extra powder can I use safely? What kind of velocity increase can I expect to (safely) get? Printed data is hard to find.
Joe,You can use your standard 223 seater to load for fireforming only. Once you blow out the cases to the 40 degree shoulder, you must have a dedicated AI seater.
I am not familiar with that particular seater, but if it uses a "chamber" type insert to line everything up, I don't think it would work properly. After you blow out the brass the shoulder will be 40 degrees of course, but the case taper is changed considerably so that the shoulder diameter is larger, too. I use Wilson seaters mostly & have them modified with the chambering reamer so they work with my wildcat cartridges. The best thing to do in your case is to call RCBS customer service and ask if you are still uncertain.Joe,
The RCBS Comp seater won't work on the ackley brass ?
Thanks Robert
When my 6.5x55 BJAI was built, the Redding seating die had to be modified with my chambering reamer.I am not familiar with that particular seater, but if it uses a "chamber" type insert to line everything up, I don't think it would work properly. After you blow out the brass the shoulder will be 40 degrees of course, but the case taper is changed considerably so that the shoulder diameter is larger, too. I use Wilson seaters mostly & have them modified with the chambering reamer so they work with my wildcat cartridges. The best thing to do in your case is to call RCBS customer service and ask if you are still uncertain.