Good comfortable load (half grain below the manual maximum because it shoots best there) for the 55g NBT in my Savage .243 is 44.0g of IMR4895, WLR primer, Win Brass, seated 0.020" off the lands. Shoots them into ~1/2" groups at an average 3,855 fps out of a 22" barrel.
I am currently working up a load for the nossler 55gr. also.
in a rem 700 sps varmint 26" heavy barrel,I have only tried 3 loads so far, the max load of 44.5 gr. of h4895,,was giving me under .5 moa,but my primer's are extremely flattened,,,I'm gonna try backing it down .1 gr at a time,to see if I can still maintain accurracy,,,my other load of 43.9 was under an inch of moa and no flattened primer's .I'm goon try increasing it a .1 gr. at a atime and see what happen's,,,I'm glad you started this thread,,I'm really interested in what other folks are using and getting for results
I also shoot a tikka T-3 lite with winchester brass WLR primers and nosler 55gr ballistic tips. My load is 51.0gr H414 for about 4050 fps.
This load is quite accurate as you can see (I'm hard on myself, measuring groups from the outside to outside) and very flat shooting, but it does tend to heat up the barrel a bit! No doubt, its hell on PD's, jacks and misc. varmints of all types.
Use a long drop tube like the one from forster and tap the sides of the case as it fills up. H414 compacts nicely once it settles. Seat bullets to the nosler COAL, don't even bother messing with seating depth.
The 70gr ballistic tip is also great with Varget. I've worked up a good 62gr varmint grenade load as well but can't remember the powder choice.