For testing purposes, everything was precisely weighted.

In practice, shot and powder are volumetrically metered using the appropriate MEC charge bar and bushing.

-Victor

I’m like you when I first started loading Bismith I weighed each load , now I just drop it as I would lead shot .

No it isn’t ! There’s WSF and there’s also WST . As stated WSF is Winchester Super Field and WST is Winchester Super Target . There’s also a WSH Winchester Super Handicap . I took pics of WST and WSH but sorry to say all my WSF is in at the shop .

Thanks for clarifying it for me.

10 Bismuth WSF powder
 

Your post is old, but I just wanted to Thank You for sharing your pressure test data.

Rob:

You are welcome. This is still my go-to load for 10 gauge. I use 24 grains of WSF and 1.25 ounces of shot (lead or bismuth, depending on the target). Smokes clays and kills ducks dead.

-Victor

I’ve got 8 plus pounds of WSF . Was using it for 16 gauge , but since I e just about quit shooting the 16’s now I think I’ll try some of your WSF 26 grains with 1 1/4 ounces of shot . And just so happens I have a fair amount of fired 10 gauge hulls both green Remington’s as well as red RST/Cheddites . Perhaps a box of each .

Craig:

Start with 24 grains. I think you will find 26 grains a bit too spicy (high velocity).

-Victor

Well I thought that as well after making my post . I took screenshots of all three pressure test sheets . I’ve gotten a pretty decent number of 1 1/4 ounce loads , several 1 1/8 ounce loads , a couple ounce loads and one 1 1/2 ounce load . Seems SR7625 , Unique , Red Dot , Green Dot , WSF , W572 and Universal Clays all fit in , in atleast one weight range and some several weight ranges .

I loaded 25 with REM hulls using the MEC 25 bushing which supposedly drops 23.8 of WST and did the same with RST/Cheddar cheese hulls only difference I used a 3/8” 16 wad in the RST’s . Today I decided to try the MEC 24 which supposedly drops 23 grains of WST . Tuesday I shot two of the 23.8 loads and they weren’t bad in an EH 2 frame 28” .