[fnbrowning]

I don't think that 5.1gr of Unique is near maximum.
To find out why, let's look at my numbers, using my Browning Hi-Power. Standard Barrel

First, I Chrony'ed two factory loadings:

Cartridge Hornady Custom
Bullet/Weight 115 gr JHP XTP

Number of Shots 10
Avg Velocity 1252.4
Avg Deviation 6.719
High Velocity 1261
Low Velocity 1238
Extreme Spread 23
Std Deviation 8.23

Cartridge Remington +P+
Bullet/Weight 115 JHP

Number of Shots 10
Avg Velocity 1318.9
Avg Deviation 51.359
High Velocity 1375
Low Velocity 1102
Extreme Spread 273
Std Deviation 80.22

Now, my loading:

Cartridge Ron's load
Primer Smith & Wesson
Bullet/Weight Hornady 115 XTP
Powder/Weight Unique 6.1
Cases Mixed, once fired

Number of Shots 10
Avg Velocity 1251.2
Avg Deviation 40.92

High Velocity 1318
Low Velocity 1051
Extreme Spread 267
Std Deviation 73.82

First, we see that 6.1 grains Unique does not generate numbers as high as the +P+ Remington.
My cases and primers show no abnormalities. Personally, I think that I accomplished what I set out to, and this is, to duplicate the accuracy and punch of the Hornady Custom factory loading.

My load data is for information only. Do not take it as a "safe" load for your particular firearm.