Quote Originally Posted by Andyt2 View Post
Thanks for getting back to me - Kenny (Eagle Eye shooting) has used this bullet made in Zinc. He did use Winchester 231 and has loaded it up from 5.0grns to 6.0grns the best accuracy was 5.3grns out of a 9mm pistol, with no signs of pressure issues. Now if you look at the powder charts Green dot is almost the same as Winchester WSH. I am currently loading 4gns of WSH in my 124grn lead 9mm loads and they are shooting great and accurate. Hope this helps in coming up with more/better data for the WSH powder. Also I am shooting this out of the Ruger PC in 9mm, not in a pistol.
Gotcha, then we aren't too far off.

There are some variables that can help refine QuickLOAD results. One of these is the capacity of the case. I am sure you are aware that pressures in pistol loads can be quite sensitive to the seating depth of the bullet. This is because the bullet will displace available the volume within a case. The same effect can be had if the case is thicker or thinner in the web. QuickLOAD uses an assumed value of 13.79gr H20. You can measure this by taking a primed case, placing it on your scale, zeroing the scale and then slowly drip in the water until the water is level with the top of the case. The weight indicated is the weight in grains. QuickLOAD will automatically calculate the volume displaced by the bullet and use the remaining volume for use in pressure calculations. If you are using cases with a little larger volume than typical, then we can expect to be able to put a few tenths more powder into the case without bumping up past service pressure.

I've adjusted the barrel length to reflect 16in. I'm not sure how I missed the Ruger PC...

Estimated Velocity: 1579fps

Just a word of caution, depending on the rifle, brass and primer used, you may not observe signs of high pressure, even if you are exceeding service pressures in a pistol load. Many pistol primers have the same cup thickness as their small rifle counterparts. Therefore they will not flow or otherwise exhibit the traditional high pressure signs of high pressure we may be used to seeing in rifle loads until you are in proof load territory.

QuickLOAD indicates that Alliant Green Dot is a substantially faster burning powder then Win 231 in this given load. Generating 43kpsi@4.9gr while Win 231 is 34kpsi at the same charge weight. Burn rate charts are a useful reference tool to see powers that MAY be comparable in burn speed, but remember they can shift around quite a bit depending on what the pressure and application is.

Thanks,
Jay Andrew
www.theballisticassistant.com