CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The High Road, nor the staff of THR assume any liability for any damage or injury resulting from use of this information.
PLEASE do your due diligence before attempting to copy this load - although very fun and safe in MY setup, the same may not be true for you. I worked up to this!
OK, now that all the warnings are out of the way, I suppose it's time to make my first post here! I've gained a ton of valuable info from lurking/reading this forum, so now I'm happy to have finally made an account and post some data of my own. Been at this for several months now and have really caught the bug.
This load is pushing the Hornady 155gr XTP bullet to its absolute limits in terms of velocity. It hits like a ton of bricks, and absolutely explodes water jugs. Hitting a 10" x 3/8" AR500 gong, 2 well timed shots flipped the entire thing on its chains over the top of the stand. 1 shot gets the heavy gong swinging like crazy. With the ballistics gel, it sent the whole thing flying. The energy transfer is severe. Accuracy was also quite good.
Data:
10mm Auto
Brass: Once fired PPU brass (all carefully inspected)
Primer: CCI 300
Bullet: 155gr XTP .400"
Powder: Alliant Blue Dot
Charge: 13.1gr
COAL: 1.260
Gun:
Glock G40 MOS
KKM 6.5" Barrel w/ 4-port comp
Velocity AVG: 1585fps, MAX = 1599fps
Calc. Kinetic Energy: 880 ft.lbf
I really wish I had the presence of mind to record the whole string of velocities in the moment - I was with friends, though, and didn't want to slow everyone down too much. I saw 1570s, 1580s, 1590s and a max of 1599 (so close)
The load penetrated roughly 13-14" in Clear 10% gel. Star-like fragmentation for 3-4" and massive expansion. I did not notice full jacket separation, but there was some. I will have retained weight figures and expansion figures later, the recovered projectiles are at my brother's house (the gel is his).
Primers are only ever so slightly flattened and the max case expansion is roughly 0.4308" as the highest of the cases I analyzed. Most were right at 0.428"
Attached are a few images - analysis via precision optical surface scanner showing max case expansion, primer condition, and brass profile, and a picture at nighttime to show the flash. The flash truly wasn't bad at all, not like what some people would have you believe about Blue Dot being blinding at night. Perhaps the comp was acting as a kind of flash hider as well?
Happy to answer any questions or comments you may have! Look forward to the discussion!
In the Optical Surface Scanner image, on the bottom left you see max case expansion [radius = 0.2154", ergo diameter = 0.4308"]
Bottom Middle = the profile of the brass, showing that there is no smile/pressure ring/gross deformation, only the slight bulge.
Top Right = primer condition. The color:height legend is in the top left of that image. This image shows that the face of the primer is flat to the rear of the case, but there is still a clearly visible curve/gradient to the edge of the primer, showing it is not overly flattened or extruded.
Enjoy!
PLEASE do your due diligence before attempting to copy this load - although very fun and safe in MY setup, the same may not be true for you. I worked up to this!
OK, now that all the warnings are out of the way, I suppose it's time to make my first post here! I've gained a ton of valuable info from lurking/reading this forum, so now I'm happy to have finally made an account and post some data of my own. Been at this for several months now and have really caught the bug.
This load is pushing the Hornady 155gr XTP bullet to its absolute limits in terms of velocity. It hits like a ton of bricks, and absolutely explodes water jugs. Hitting a 10" x 3/8" AR500 gong, 2 well timed shots flipped the entire thing on its chains over the top of the stand. 1 shot gets the heavy gong swinging like crazy. With the ballistics gel, it sent the whole thing flying. The energy transfer is severe. Accuracy was also quite good.
Data:
10mm Auto
Brass: Once fired PPU brass (all carefully inspected)
Primer: CCI 300
Bullet: 155gr XTP .400"
Powder: Alliant Blue Dot
Charge: 13.1gr
COAL: 1.260
Gun:
Glock G40 MOS
KKM 6.5" Barrel w/ 4-port comp
Velocity AVG: 1585fps, MAX = 1599fps
Calc. Kinetic Energy: 880 ft.lbf
I really wish I had the presence of mind to record the whole string of velocities in the moment - I was with friends, though, and didn't want to slow everyone down too much. I saw 1570s, 1580s, 1590s and a max of 1599 (so close)
The load penetrated roughly 13-14" in Clear 10% gel. Star-like fragmentation for 3-4" and massive expansion. I did not notice full jacket separation, but there was some. I will have retained weight figures and expansion figures later, the recovered projectiles are at my brother's house (the gel is his).
Primers are only ever so slightly flattened and the max case expansion is roughly 0.4308" as the highest of the cases I analyzed. Most were right at 0.428"
Attached are a few images - analysis via precision optical surface scanner showing max case expansion, primer condition, and brass profile, and a picture at nighttime to show the flash. The flash truly wasn't bad at all, not like what some people would have you believe about Blue Dot being blinding at night. Perhaps the comp was acting as a kind of flash hider as well?
Happy to answer any questions or comments you may have! Look forward to the discussion!
In the Optical Surface Scanner image, on the bottom left you see max case expansion [radius = 0.2154", ergo diameter = 0.4308"]
Bottom Middle = the profile of the brass, showing that there is no smile/pressure ring/gross deformation, only the slight bulge.
Top Right = primer condition. The color:height legend is in the top left of that image. This image shows that the face of the primer is flat to the rear of the case, but there is still a clearly visible curve/gradient to the edge of the primer, showing it is not overly flattened or extruded.
Enjoy!
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