Loading data for the 500 A-Square

[almorgan]

Some years ago I was in love with bg bore, and I bought some. One of them, a A-Square Hannibal in 500 A-Square is in my gun safe now at least 10 year and I never shoot it.
Now I would like to test it and would like to to find some loading data. Not an easy job, because most American powders are not easy to find here in Italy, and I need to stay with the few imported, mostly for pistol and mure usual rifle calibers.
Someone have a source of data or this moe (minute of elephant) varmint round?
I'm a follower of this forum for the smaller caliber I shoot: 22-250, 220 Swift, 6-284, etc. and I hope I can find an help here.
Thank you in advance.

ALMorgan

 

[Big Stick]

I have A-Square's manual that has load data for the 500. It has data for the following powders: H-4895, IMR-4064, RL-12 (no longer made), IMR-4320 & RL-15. Can you get any of these powders in Italy? If so, let me know which ones and I will pass along the data. By the way, the only data A-Square has is for the 600 gr. bullet weight.

Let me know.

Kevin

 

[almorgan]

H4895, IMR 4064, IMR 4320 are available here.
Some loading data for IMR 4198 will be appreciate, but I think is a bit too fast in the quantities used for the 500 A-Square.
I appreciate your attention very much

ALMorgan

 

[Big Stick]

Here is what the A-Square manual shows for those three powders. I don't have any info for IMR-4198.

600 gr. A-Square Dead Tough bullet
26" barrel
Maximum Average Piezo PSI: 63,860

H-4895 106.0 gr. 2346 fps 55,300 psi Average
H-4895 115.0 gr. 2474 fps 61,600 psi Average

IMR-4064 112.0 gr. 2380 fps 52,000 psi Average
IMR-4064 117.0 gr. 2503 fps 61,300 psi Average

IMR-4320 110.0 gr. 2382 fps 59,100 psi Average
IMR-4320 115.0 gr. 2465 fps 65,700 psi Average, load exceeds max avg psi

Hope that helps and gives you a place to start with those powders.

Kevin

 

[almorgan]

Thank you Kevin. I'll keep the forum informed.

ALMorgan