APA has the cleanest set up for a dbm out there. It looks and functions great.
it would be my first choice for gun i was going to hunt with.
a word of caution
I built a 260 some years ago, I was all obsessed with speed so I had it chambered with a long i think 100thousandths reamer to seat the bullet long and get max speed
it shot great but I had to run modified aics mags or alpha mags, I will never run alpha mags again, i had more issues with those than previous mags.
if i were to do it again, i would set up my chamber to work with an unmodified aics mag, and keep things simple
what brass are you going to shoot?
if rem, win or other why not run a 6.5 creed? its a little shorter will give you more flexibiltiy or better yet a 6.5x47?
excellent brass, havent heard a report of one not hammering
I am all about function and accuracy over speed now myself
best of luck on the project