QuickLoad data for 300 H&H, IMR4451, 190gr

[MRogersII]

Looking for starting load data from a valid source for IMR4451 in the 300 H&H with 190gr Nosler LR AB.

All of my manuals pre-date this powder. Any help would be much appreciated.
Thank you
Michael

 

[MRogersII]

Could someone possibly run this through Quickload?

 

[FeMan]

I ran it and it looks way too fast to be optimal. According to QL it pressures out at 92% case fill and gets a max velocity of 2835 in a 24-inch barrel. H4831sc looks optimal for that combo. Hope that helps.

 

[MRogersII]

I ran it and it looks way too fast to be optimal. According to QL it pressures out at 92% case fill and gets a max velocity of 2835 in a 24-inch barrel. H4831sc looks optimal for that combo. Hope that helps.

Many thanks, Sir. I appreciate the info. I thought that I had read that 4451 landed between 4350 and 4831, and so expected it to be a better fit. Can I ask what was the pMax and corresponding charge for 4451?
Michael

 

[FeMan]

The Pmax was around 62 ksi. Since QL doesn't do a good job predicting charge weights that correspond to max pressure unless/until you calibrate the model for your rifle, brass, etc., I would not believe the charge weight and dont think it is responsible to post something that might be erroneous.

If you want to pursue it and have a good chronograph, you could do a powder ladder and stop when you see pressure of when you hit that velocity (assuming you have a 24-inch barrel).

 

[PhilC]

Good starting point is Nosler's online data - https://www.nosler.com/300-holland-holland-magnum