9mm 115 and WST

[idahoglock36]

I waiting on my order for the new 9mm 115 from Missouri Bullet.

Any recommendations on a starting point for WST?

Thanks

 

[mongoose33]

I've been doing a lot of shooting w/ WST out of 9mm, but using 125gr LFP from Precision Bullets. It's lead w/ a coating, and in my comparisons of Missouri Bullets w/ the Precisions they have been similar in .45.

Anyway, here's a workup for those 125gr bullets in 9mm using WST with mean velocity in fps:

Wt. Mean ES SD
4.0 1008 23 9
4.2 1032 57 21
4.4 1035 82 32
4.6 1068 65 23
4.8 1087 40 15
5.0 1110 67 26

You could probably use any of these with the lighter 115gr bullet at a conservative OAL. I'd start with 4.0gr, or maybe the 4.2, and work up.

Just as a comparison, I was out yesterday testing WST under the 124gr Hornady XTP bullet which is jacketed unlike the Precision bullet. At 4.8 grains my velocity with those XTPs averaged 1143fps.

 

[Galil5.56]

Anyway, here's a workup for those 125gr bullets in 9mm using WST with mean velocity in fps:

Wt. Mean ES SD
4.0 1008 23 9
4.2 1032 57 21
4.4 1035 82 32
4.6 1068 65 23
4.8 1087 40 15
5.0 1110 67 26

What pistol/barrel length were these rounds fired from, and the bullet diameter? Almost seems as if "WSF" was used instead of the requested WST seeing these results, especially the 5 grain velocity result relative to the 4 grain results?.

 

[idahoglock36]

Thanks for the data. I'll start around 4.2 and work up.

Thanks again

 

[mongoose33]

What pistol/barrel length were these rounds fired from, and the bullet diameter? Almost seems as if "WSF" was used instead of the requested WST seeing these results, especially the 5 grain velocity result relative to the 4 grain results?.

Fired from a Springfield XD 9mm with a 4" barrel. Bullets are .356.

WST is what the powder is. All charges were individually weighed on a Dillon electronic scale, checked with check weights.

The 4.2 and 4.4 are pretty similar in velocity; the 4.4 had a low velocity round which dragged down the average and ballooned the SD and ES.