Ripp - what is the case capacity compared to, say a 6.5x300WTBY?

Due to the base being .532" (same diameter as a standard mag's belt) - with minimum taper, but still about .2" shorter than the .300 WTBY case, perhaps the capacities are about the same - or not enough higher to give much more performance. The .26 Nosler does have a shorter neck which will increase case capacity as well.

With ctgs. of this size, it usually takes a LARGE change to make any tangible increase in speed- at the expense of quite dramatically increased powder charge.

Get a good carbon cleaner, BTW. Some guys use GM upper cylinder cleaner - there are others, of course. I'm currently using a Kleen Flo choke and carb cleaner which seems to do a good job in my little .17's and .222 - which are much less carbon builders than about anything else.