Any recommendations for pellets for the DRS?
Will be hunting squirrels at less than 50 yards.
.22 cal.
Jsb hades, jsb 15.89 (cousin to hades) or the jsb 18 grain all perform fantastic out of every 22 fx liner ive ever shot. Jsb monster redesigns will too, which means monster hades as well.
 
I got a .22/600mm DRS specifically for squirrel hunting and have been using JSB 18.13 pellets with good results.

The JSB 15.89 pellets also work well, just found that the 18.13 to shoot a bit better. I'm typically seeing 1/2" or so groups at 40 yards with unsorted pellets in light breezy conditions. In practical situations (leaning against a tree for support) minute-of-a-squirrels-head accuracy out to 50ish yards has not been a problem. 😁

I tried several other brands of pellets and settled on the JSBs.

Hope this helps!

Cheers!