Try some tomorrow to see where they are at. They have the XTP load so I am expecting 1250 FPS or so.

Looking good!
Hey Intercooler measure his COL, to see where he set the length...1.2500" - 1.2600" 

1.251", 1.250", 1.253", 1.251", 1.248"

1.2500" was what I was expecting! Thanks! 

Nice. Know what charge he used? 800X, right?

Don't know but will soon. He may have changed like the others.

Okay, thanks.

  I need to phone Kevin and see if I can get the load on these. Things possibly change with the bullet or is this scaled back?

200gr Gold Dot with XTP load Limited Pro 4.75" 1177, 1167, 1162, 1155, 1159, 1150. Average = 1161.66 FPS/ 599 LBS. I'm not complaining because they are pleasant to shoot and right on the edge of what I consider real 10mm at 600lbs. It may actually be perfect for this bullet as I don't know how they would do in the 1250 FPS range.

Well This is what I think he loaded for you based on those numbers...Limited Pro 4.75" 1177, 1167, 1162, 1155, 1159, 1150. Average = 1161.66 FPS/ 599 LBS

If it is LongShot..8.8 grains of LongShot is my best guesstimate. 
If it is IMR 800X..9.0 grains of IMR 800X is my best guesstimate. 

I'm sending two down with the next batch to see.

The other stuff plus (2) 9x25 Dillon Underwood and (2) Buffalo Bore 155 Barnes.

Good luck I hope everything works out I have high expectations, I can see some tool marks left that worries me a little?

Yea the pulling tool marks are deep on them, I can see where it may cause a petal to start to shear during expansion.
This is why the jello shots will show if this will present an issue or not...

I got about 1,140 fps from XTPs with 8.3 gr of 800X

According to my Hornady book, 8.1 gr is the max load of 800X for a 200 gr XTP but it also says that charge is supposed to be only 1,050 fps and it got me to about 1,130 fps. I'm reluctant to work up much further. Can someone verify Kevin's recipe for 200 gr XTP? I think Shadow posted a pulldown and I think Intercooler verified it with Kevin but I can't find it. Knowing the recipe and velocities for both the 200 gr XTP and Gold Dot would make me more confident about pushing further past the book limit.



On the positive side, going through my log book, I found some 800X loads that ought to do the trick nicely.

7.5 gr
______
1,037
1,049
1,039
1,043
1,071



7.7 gr
______
1,067
1,067
1,067 (no kidding)
1,049
1,047


I think I'll go with 7.6 gr to be on the safe side to keep it subsonic, just in case the Gold Dot pushes a little faster than the XTP.

Well I have never pulled the Underwood 200gr Hornady XTP,  However I have loaded to the 9.4 grain level of each Imr800X and LongShot.

Redline did pull some...
http://10mm-firearms.com/factory-10mm-ammo-pull-downs/finally-5-underwood-10mm-ammo-disections/