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Ryan:
I started this reloading stuff right after you and appreciate your chrono info and record keeping. I’ll share some of what I’ve learned from the multitude of knowledgeable friends with whom I shoot here.

I’ve loaded a little over 1000 rounds now but I have only chronographed rounds out of my first 200 round batch.

Details (10 round sample):
9mm - 147 gr Speer TMJ Truncated nose OAL 1.135� Hod Titegroup 3.2 gr. In Glock 34
Avg: 896.9
Max: 908.3
Min: 882.9
Std Dev: 8.49
Spread: 25.4

With our IDPA velocity floor for 147 bullets at 850, my average for this batch is over 5 std deviations and my minimum is over 3 SD’s above floor. From Tom’s recommendations above on being at least 2 standard deviations over the target velocity I’m happy with this load.

I have since been loading Berry’s and Delta Precision 147 gr bullets to 1.162� OAL and same powder load (3.2gr). This OAL gives me the same case volume – or whatever it is called – and should be very close to same velocity . I will chrono the first time someone has a chrono set up that I can borrow. I think (and hope) it will be good, and I am happy shooting both these bullet combinations.

From advice I’ve received I would recommend also recording the specific bullet you are using, the primer used, and the overall length. The overall length plays a big part in the pressure built up and depends a lot on the bullet shape. I’m told some brands of primer (or size of primer) also make a difference in the power.

What bullet and OAL are you using?

Thanks for the forms!
Hope to see you and Deron shooting in Dallas area soon.

Don P