After buying a Hornady LnL press, I started researching all of the powered trimmers- The Giraud, Gracey, and Dillon 1200B. Well, today I found a used Dillon trim die in .223 for a really good price, and bought it. So now I am set on getting the 1200B.
I understand that the Dillon makes a really clean cut, but some say they still chamfer case after trimming. Others say they use a "M die". I dont remember who makes (Lyman, maybe?) the die, but I guess it expands the case mouth slightly to accept a bullet.
Also, others have complained about the Dillon trim/size die because it puts too much neck tension on the bullet. This complaint comes from mostly the bench rest crowd as I understand that too much neck tension can result in more bullet runout.
I think have come up with solutions for both issues, and I was wondering what you guys think of it.
First off, I plan to load in two different stages, case prep, and loading. The press will be set up accordingly.
For the neck tension issue (If this is even an issue in 3 gun)- During the case prep stage, I think I can use my RCBS F/L sizing die after the Dillon size/trim operation. However, I can run the die body all of the way up so that the case doesn't get resized, but turn the expander all of the way down to open the neck up slightly.
Loading without chamfering- Except for my hunting bullets, I always run boat tail designs. If I were to buy a competition seating die that aligns the bullet, seating stem, and case mouth, would chamfering be necessary? Or should I look at buying the "M die"? If I do end up with the m die, can I still use my Lee FCD, or will I have to find a taper crimp die? However, I like the idea of owning a competition seating die because my home range isn't friendly to USPSA practice , and shooting tiny groups is my only option.
Sorry for the long winded question, but I dont want to buy an expensive, fancy trimmer and still have to chamfer every case by hand. I like the fact that I can run the Dillon trimmer during the case prep stage. I think this will save time over the Giraud.