500 A Square Load Data

[Arthur Morta]

I am looking for minimum/ starting load data for the .500 A²: -
570gr
600gr
Would anyone have such, using the Vihtavuori range of 500 series powders?

 

[BeeMaa]

@USMA84DAB has a bunch of info, but not sure if he's worked with that powder.

 

[USMA84DAB]

From the A-Square reloading manual -

H4895 - 106 grains/2346fps/55,300psi
117 grains/2527fps/64,000psi - RED LINE/MAX LOAD

IMR4064 - 112 grains/2380fps/52,000psi
117 grains/2503fps/61,300psi

RL12 - 113 grains/2323fps/42,900psi
118 grains/2481fps/61,000psi

IMR4320 - 110 grains/2382fps/59,100psi
115 grains/2465fps/65,700 - RED LINE/MAX LOAD

RL15 - 113 grains/2316fps/43,000psi
118 grains/2467fps/57,500psi

600 grain projos - 26" barrel

I also recently noticed that Norma 203B is right next to RL-15 on the burn charts. I don't have specific load data from Norma on it, but it bears investigating - just haven't had a chance to get to it yet.

 

[Arthur Morta]

Many thanks Squire. This should give me a base to progress with

From the A-Square reloading manual -

H4895 - 106 grains/2346fps/55,300psi
117 grains/2527fps/64,000psi - RED LINE/MAX LOAD

IMR4064 - 112 grains/2380fps/52,000psi
117 grains/2503fps/61,300psi

RL12 - 113 grains/2323fps/42,900psi
118 grains/2481fps/61,000psi

IMR4320 - 110 grains/2382fps/59,100psi
115 grains/2465fps/65,700 - RED LINE/MAX LOAD

RL15 - 113 grains/2316fps/43,000psi
118 grains/2467fps/57,500psi

600 grain projos - 26" barrel

I also recently noticed that Norma 203B is right next to RL-15 on the burn charts. I don't have specific load data from Norma on it, but it bears investigating - just haven't had a chance to get to it yet.

 

[JPmbogo]

Lighter practice loads can be accomplished with Accurate 5744. Also, it seems most load data out there is for the 600 gr bullet. There are several 570 .510 bullet offerings and Woodleigh offers a 450 gr. Now, some of you might wonder why not just load this beast to its full potential. That's fine if you are after something that might "shoot back" so to speak. However, I have never had that problem with paper targets.