American Reloading MP 501 data / SHP761 & or PP 3000?

[SD guy]

Hello: Expect I am interested in this propellant as a 6mm ARC propellant, that is described as similar to SHP 761 & am willing to roll the dice to give this propellant a try. Beyond the burn rate chart offered on the ballistic assistant I am finding zero information on this propellant.

I have used another propellant that was described as similar to SMP 763 or Power pro 2000 & suspect a slightly faster propellant may fit my use better in many applications. Based on the burn rate chart I am expecting the SHP761 may be a bit faster .

http://www.theballisticassistant.com/wp-content/uploads/2021/07/Powder-Relative-Burn-Rate-7-5-2021-Viewing.pdf

Any chance anyone has had any exposure to this propellant or any information about it that they would be willing & or able to share?

"MP 501 SMOKELESS RIFLE POWDER - 8 LBS​

* Similar to SHP 761 * FREE SHIPPING AND NO HAZMAT FEE EXPECT 5-7 BUSINESS DAYS FOR POWDER ORDERS TO BE PROCESSED AND SHIPPED OUT Work up all loads using SHP 761 minus 10% Minimum Load Customer assumes all liability for care and use of this Hazardous Material NA 3178 - 4.1 NO REFUNDS ON SMOKELESS POWDER (ALL SALES FINAL)"

 

[SD guy]

Will be giving this a go soon. Showed up today. If I put much stock in the burn rate charts this powder may fall between reloader 15,5 & N540. Was not expecting a Stick powder. So I was a bit surprised to see this is a short extruded powder.

 

[SD guy]

27 Grains is as much as id care to stuff in the 6mm ARC case & is a mild load for just over 2500 FPS from the 22" barrel. Accuracy was looking more promising at 26.5 grains.

This MP 501 may be considered more fitting for a case with a bit more capacity.

 

[DGP4]

SHP761 is the equivalent on the burn rate chart to H414 and W760. That doesn't mean you can use the reloading data for those powders, but if you stay a grain or two below the starting loads for them you should be OK.