375 H&H. Nosler Accubond 260Gr, VihtaVuori N540

[Alexander375hh]

Nosler Accubond 260Gr, VihtaVuori N540
Are there results ?

 

[Shootist43]

Alexander, are you asking for reloading information using these parameters?

 

[sgt_zim]

don't see a load for N540, but Nosler #9 has a load for N160 and 260 AB

 

[Alexander375hh]

Alexander, are you asking for reloading information using these parameters?

Yes. Speed,loading gr

 

[MarkB]

No idea about VihtaVuori N540. Did just load some 260 gr accubonds with Win 760 for upcoming lion hunt. Rifle seamed to like best.

MB

 

[Shootist43]

Alexander, I have a software program that does a fair job of simulating / predicting likely results. What length barrel (in inches) does your rifle have measured from the muzzle to the bolt face? Note it is easiest to put something i.e. a cleaning rod or wood dowel through / down the bore.

 

[Alexander375hh]

Alexander, I have a software program that does a fair job of simulating / predicting likely results. What length barrel (in inches) does your rifle have measured from the muzzle to the bolt face? Note it is easiest to put something i.e. a cleaning rod or wood dowel through / down the bore.

Rifle Barrel Length 21.25". Twist:12"

 

[Clodo Ferreira]

Hi Alexander,
I have and use the .375 H&H since 1992.
Have you consulted the Vihtavuori guide?
Anyway, I did into the 2021 reloading guide in .pdf.

https://www.vihtavuori.com/wp-content/uploads/2021/02/Vihtavuori_Reloading_Guide_2021_ENG_ROW_www.pdf

In it, there are no data for the great (I use them) Nosler Accubond 260 gr. But there are loading data with N540 for the Sierra 250 gr and for the Speer 270 gr.
Using Remington cases in a gun with 24,5" barrel lenght- 1:12" rifling twist

Sierra 250 gr Maximum safe load 74.4 for 2808 f/s
Speer 270 gr Maximum safe load 72.7 for 2707 f/s

Interpolating the data for the 260 gr Nosler Accubond you can arrive at a reasonable safe maximum load.
By the way, I use R15 for this bullet in my Winchester 70 Pre-64 with 25" barrel lenght-1:12" twist.
My maximum entirely safe load in Winchester cases and magnum primers is 76 gr R15.
The N. Accubond is not a monometalic bullet and behave as a normal soft point one. I conclude on that because I have loaded that N.Acc., the Sierra 250 gr and the Hornady Spire Point 270 gr for years.
So, in my opinion you can start at 73 gr of N540 with the 260 gr Accubond without any worry. The velocity should be, in your 21,25" rifle barrel lenght, around 2600/2650 f/s.

Good luck!

CF

 

[Shootist43]

Alexander, I'm sorry that I haven't replied to you with a recommended load. I just got a new computer and to my chagrin the QuickLoad program wasn't put on my new computer. However my friend is going to load it on my new one in a couple of days. Once that is done I'll send you the information I promised.

 

[Shootist43]

Alexander, my QuickLoad software is back up and running. Unfortunately for you VV N540 isn't a very good powder for this application. Velocity is low at 2330 FPS, Foot Lbs. of Energy is 3134, load density is 102 %, chamber pressure is only 36,999 vs 62366 PMax . You should look for another powder.

 

[Christot]

Are you sure? Load density 99% (71.75gr), chamber pressure 4240bar (61500PSI), OAL 91,44mm (3,6") = 829m/s (2720 fps) and 5790J (4271 ft-lbs). I would say it's close to optimum.

 

[Shootist43]

Christot, thanks a bunch. The piss poor results I stated in my post were for VV N560. MY BAD!!!

Attached is the QuickLoad simulation for VV N540 and the 260 Gr. Nosler.

 

[Alexander375hh]

Christot, thanks a bunch. The piss poor results I stated in my post were for VV N560. MY BAD!!!

Attached is the QuickLoad simulation for VV N540 and the 260 Gr. Nosler.View attachment 412634

Thank you

 

[dchamp]

Alexander375hh, After looking at the Vihtavuori manual I think I would start at 67.0g and work up. Here is a different view from QL. Remember this is just a modeling guide, hope it helps.