What 10mm velocity do you expect to be reached from 4.5" - 4.75" barrels, with any bullet weight(s) you care to comment on, before you will consider it a "true" 10mm load?
There are two ways to answer this question.
First, the literal answer. Any velocity which exceeds that which can be safely obtained with a 40 S&W is a 10mm load. For 180 grain this would be about 1000 fps +
But to be considered clearly near the top of the 10mm chain I would say this:
200 gr - 1100 fps+
180 gr - 1300 fps+
170 gr - 1400 fps+
Those values will be exceeded by the hottest loads out there. I won't comment on lighter bullets because I rarely look at them.
The best chart is the Bren Ten one for ammo.
https://docs.google.com/spreadsheet/ccc?key=0Ak5OC6bPsjO8dEh6eGZ3N3hpUU13SXM5cm9pZy16T0E#gid=3
I put that together and made it public for everyone.
Quote from: Intercooler on June 24 2012 09:34:51 PM MDT
https://docs.google.com/spreadsheet/ccc?key=0Ak5OC6bPsjO8dEh6eGZ3N3hpUU13SXM5cm9pZy16T0E#gid=3
That chart should be a sticky. Nice job! Really spells it out overall, without any rounding of numbers, from one end of the "power-spectrum" to the other.
To me, in simplest perspective, any round doing 700ftlbs out of a standard length bbl.
Quote from: uz2bUSMC on June 27 2012 03:43:43 PM MDT
To me, in simplest perspective, any round doing 700ftlbs out of a standard length bbl.
This is actually a really good, easy to apply standard.
For those that might need it , the formula for ME is:
( Velocity * Velocity * Bullet Weight ) / 450450
Where velocity is in fps and bullet weight is in grains.
Quote from: sqlbullet on June 27 2012 04:27:58 PM MDT
Quote from: uz2bUSMC on June 27 2012 03:43:43 PM MDT
To me, in simplest perspective, any round doing 700ftlbs out of a standard length bbl.
This is actually a really good, easy to apply standard.
I'm thinking the same.