571 and 473aa powder

[ed etheridge]

i have picked up some winchester 571 and 473aa powder has anyone used either as a cast bullet powder if so give what loads you've tryed or imfo i can use thanks Ed:-D

[Johnch]

571 is easy
Use HS-7 Load data , Hodgdon.com should have some

473 was my favorit target load powder for trap and skeet .............years ago

I remember I loaded 38 and 45 with it
But I have no idea what I did with the data

I will see if I saved any

John

[MtGun44]

I used to use 571/HS7 for making major caliber in my .38 Super racegun.

I used 7.2 gr under a 158 gr SWC and shot about 60,000 of these. This is
NOT OK in an unsupported chamber (normal Colt type bbl) unless you use
Rem +P, Starline, or PMC +P brass which will last forever. Winchester brass
even +P+ will either blow out or bulge like a pregnant lady at the first (only)
firing. This load is listed in Hodgdon data as 35,000 psi, the SAMI max for
.38 Super, so it is safe, just not in Win brass. My chamber is unsupported
and with the proper brass this was a fast, accurate and safe load.

Bill

[Johnch]

I found some data
All for HS-7

NOTE needs a healthy crimp


357 mag
120 gr cast
10 gr , 11050 fps , 13.2 , 1430 FPS

140 gr cast
9.8 gr , 1120 FPS , 11.8 1350 FPS

From my load notes
357 mag
158 gr cast
10.5 gr at about 1250 fps , listed as super accuracte
Not sure if this is a min or max load

44 mag
250 gr cast , depending on GC or Plain base
14.5 or 15.2 as a start load for 920 FPS and 17.5 or 18.2 as max and 1170 FPS

OUt of my load notes , I found this data some place and used it as I wrote some notes on it ( safe in my gun )
45 Colt in TC or Ruger
250 gr cast
14.5 start 830 FPS , 18 gr max 1150 fps
My notes say I shot a lot of 17 gr at 1100 fps and it was accurate in my Black Hawlk

Also in my load notes from 1986 , god that was ages ago LOL

45Win mag , out of a 10" TC barrel
No notes on accuracy , just min and max , with expected velosity

250 gr cast
15.5 , 1250 fps , 17.2 , 1400 fps

Hope this helps with the HS-7

As for the 473
I have some notes on trying it in the 38 and 45
But I was not happy with the "sand" left in the barrel
Also accuracy was poor

Talking to a fellow shooter at the range tonight , he seems to remembers it needed a mag primer to get consistant velositys

Sorry I could not help with the 473

John

[ed etheridge]

thank guys that should get me started Ed

[billsr]

Ed:
I am using 473AA in my .45 acp loads with a 230 grain truncated cone cast bullet from Penn Bullets. I tried 6.0 grains, but it seemed a little stiff for my 1918 .45 acp 1911, so I backed off to 5.5 grains. I like it. I came across 9 pounds of it a few months back, so it should last me a long time.