random, but looking for .470 Capstick load date

[jriggs]

i know it's a stretch...but i'm thinking maybe someone here might have some info. i'm looking for some basic start info for .470 Capstick running 500 gr round nose.

I've found some odds and ends on the internet but most of it was final load date and was pushing near max pressures.

thanks in advance,

riggs

 

[TonyR]

Just happens that I saw the 470 Capstick when I was browsing through QuickLoad so here goes. I used the Woodleigh .474 inch diameter 500 grain SN WeldCore 20 seated to a cartridge overall length of 3.600 inches. According to QL, the case is rated to a max of 62336 psi. When I do this sort of "first-time" testing, I try to find something in QL that will give me about 45000 to 50000 psi as a starting point with a case that has that kind of max pressure and a powder faster than H4350. All things considered, I assumed that a Hodgdon Extreme Powder would be best for your application and it turns out that H4895 and Varget would be two of the best choices according to QL. But pretty much anything that works in a 6BR or 308 with heavy bullets would work OK for your combination. So, according to QL, 79.0 grains of Varget should give you something like 2050 fps from a 22 inch barrel with 45500 psi peak pressure, and 77.5 grains of H4895 should give you something like 2100 fps with 46500 psi peak pressure. Both of these powders have substantial lot-to-lot variations so you're results may vary. I'll be interested in hearing how this works out so keep us posted.

 

[jriggs]

thanks so much Tony, have found a lot of other info and 79-80 gr of Varget seem to be a positive starting point for the round.

I've worked up a couple and tested them out for pressure signs and things seem fine...have not had time to chrono them but they should be running in the mid to high 2200 fps range...which is perfect!

thanks again,

riggs

 

[Chuckhunter]

This may help.

http://www.reloadersnest.com/query_bw.asp?CaliberID=281&BulletWeight=500

 

[Con]

Use 458Lott data, its essentially the same cartridge but with a slightly fatter projectile.
Cheers...
Con