Re: Rem. 700 XMARK Trigger Adj. ??
Try heating up the adjustment screw and then you should be able to break it loose for adjustment. I used a soldering iron on the head of the screw and was able to free it up. Without heat I think it'll strip or break before coming loose. Once freed up for adjustment, these can make very good triggers. It is worth a try, you can always buy aftermarket.