9mm Velocity Advice Requested

[oremike]

You might be over thinking this a bit. How they shoot and are they safe is much more important than how fast they get to the target.

 

[BillM]

So I'm back at it.....took some time off to focus on my rifle and class I just took but I'm back to reloading 9mm this week.

Did a few tests this week using the formulas above. I thought I had the formula finally which is 3.4gr of titegroup at 1.16 COL but i just found I'm a little over on my goal velocity. Average for 15 rounds was 972 fps. I'm shooting for 925-950 so tomorrow I'm gonna try 3.2gr at 1.16.

This has been fun experimenting. Keeping me busy during a rather boring week (stupid rain).

1.160 in a Glock magazine is getting REALLY close to max. A few more thousandths and
you run the risk of rounds hanging in the mag. I load all my 147 coated bullet minor ammo at
1.145, fits and functions in everything so far.

 

[Tilos]

Hi Everyone,

I'm still pretty new to Reloading, my Lee Manual has been great but I have a few questions that I cant find in the book.

First some data that may or may not matter...

Test Gun - Shadow Systems MR920 9mm Compensated w/5" Barrel (its a gucci glock 19)
Powder - Hodgdon Titegroup
Casing - Range Brass, but only using Winchester cases for this test. Checked the trim length on all the test cases. I would say the average length was .745
Bullet - Blue Bullet 147gr

Here is the load data I am using which I got from the Hodgdon Website
View attachment 1112260

I made 3 sets of 5 bullets based off of grain and shot them today testing the muzzle velocity.

3.2 grs Average Velocity = 957
3.4 grs Average Velocity = 999
3.6 grs Average Velocity = 1013

Average C.O.L. for the bullets was 1.090 - 1.095"

For this test, I checked and rechecked my powder measure for each set using a Frankford Arsenal digital scale (yes I calibrated it). So I feel my powder measuring was accurate.

So comparing my results above to the starting and max loads in the screenshot, I seem to be much higher than recommended. I guess I'm asking for advice, I'm assuming the max muzzle velocity I should have is 929 according to the max load above. Why am I higher than recommended? I feel like I am doing something wrong. Should I go lower than the 3.2 grs? Maybe try 2.8 to reach the starting velocity recommended by hodgdon?

OOPS! Soryy for the echo info, I didn't read thru the complete thread before posting this.

Different bullet from load data and longer barrel, yours is 5 inch, data is 4 inch.
Coated bullets are way "slippier" than jacketed...coefficient of friction.
jmo,
.