I'll need to get pics later... The difference between a BDL and DM has to do with the action and the feed lips. The feed lips on a BDL action are built in while a DM action relies on the magazine's feed lips.
I have a Remington 700 VLS (BDL) that I use in a PSS DM stock and it works fine. The DM Magazine slides upto the feed lips of the BDL and the rifle functions fine. You could also remove the BDL feed lips if you wanted.
Otherwise, the LTR stock was designed to be used with a 20 or 21-inch heavy profile barrel. Your 24 or 26-inch heavy barreled rifle would mount but this stock isn't as masive towards the muzzle end as the PSS stock.
Like I said, I will try to post pics later but the stock is in new condition.