First it depends on your rifle twist, the bullets will do Prairie dogs (I don't know what a nbt is other than a boat tail? Nosler?)

If your guns does not like that bullet then a different mfg if its not working.

Hornady indicates 50 gr are good for that application, you are not shooting deer and their varmint bullets (or any mfg) will do the job.

Its the gun, shooter and how accurate a load that is relevant.

I would suggest you get a Hornady or Sierra book and preferably both.