I would use the H4895 if for no other reason it is one of the extreme powders
Just to clarify - for those who are unfamiliar with Hodgdon's "Extreme" powder series they are temperature insensitive. I do not believe IMR 4895 is.
But it might be the case that your rifle likes the IMR powder better than H4895. If that's the case why change? I would just test it and find out.
