This is just informational. I'm sure it won't apply to many since there aren't a ton of people shooting 10mm, but I thought I'd share.
I picked up a G20 recently and I've been ordering and trying various loads in it to see what it likes and what I like. Basically I've been in search of three different loads. A 2-legged defense load for nightstand duty (CorBon DPX was an easy choice), a woods defense load (I'm liking Underwood's loading of the Lehigh Defense Extreme Penetrator, with 727ft.lbs.), and a pull-power practice load to simulate the woods load at a cheaper price (and to show off the 10mm's power to friends of course).
The search for the practice load led me to pick up some DoubleTap 200gr (controlled expansion JHP) which is rated at about 1225 from a 4.6" barrel. This should produce 666ft.lbs. and an even higher power factor (recoil) than the Underwood load.
I got it to the range and chronoed it first with an average of 1138fps. That's almost 100 under advertized and only good for 575ft.lbs (you can get that from an up-loaded .45ACP). Power factor is still there so, for "only" $1 per round I would still be interested in this, but then I moved to target shooting.
Having just placed a nice group at 25 yards with another load, I was trying to hit a silhouette at 25 yards. Not a single round was hitting the target and I couldn't figure out why. Finally I noticed the round hitting the 100-yard berm and they were up to 20ft apart. I moved in to 7 yards and I think this picture explains what's going on.
I've seen in videos that the stock Glock barrel can stabilize up to 220gr hard cast bullets, but the design, shape, center of gravity, or some other factor must make these harder to stabilize. In the picture, none of the shots were touching. All but two keyholed at least a bit, and 4 look to have hit the target completely sideways. Every shot here was aimed either at the letter A, or about 6" below it.
The stabilization issue isn't really the ammo's fault, but it's worth putting the info out there.
As for the velocity issue, I'd read that DT commonly comes in below advertized. This is proof and I won't be considering any DT loads in the future. I'll stick to Buffalo Bore and Underwood.
I picked up a G20 recently and I've been ordering and trying various loads in it to see what it likes and what I like. Basically I've been in search of three different loads. A 2-legged defense load for nightstand duty (CorBon DPX was an easy choice), a woods defense load (I'm liking Underwood's loading of the Lehigh Defense Extreme Penetrator, with 727ft.lbs.), and a pull-power practice load to simulate the woods load at a cheaper price (and to show off the 10mm's power to friends of course).
The search for the practice load led me to pick up some DoubleTap 200gr (controlled expansion JHP) which is rated at about 1225 from a 4.6" barrel. This should produce 666ft.lbs. and an even higher power factor (recoil) than the Underwood load.
I got it to the range and chronoed it first with an average of 1138fps. That's almost 100 under advertized and only good for 575ft.lbs (you can get that from an up-loaded .45ACP). Power factor is still there so, for "only" $1 per round I would still be interested in this, but then I moved to target shooting.
Having just placed a nice group at 25 yards with another load, I was trying to hit a silhouette at 25 yards. Not a single round was hitting the target and I couldn't figure out why. Finally I noticed the round hitting the 100-yard berm and they were up to 20ft apart. I moved in to 7 yards and I think this picture explains what's going on.
I've seen in videos that the stock Glock barrel can stabilize up to 220gr hard cast bullets, but the design, shape, center of gravity, or some other factor must make these harder to stabilize. In the picture, none of the shots were touching. All but two keyholed at least a bit, and 4 look to have hit the target completely sideways. Every shot here was aimed either at the letter A, or about 6" below it.
The stabilization issue isn't really the ammo's fault, but it's worth putting the info out there.
As for the velocity issue, I'd read that DT commonly comes in below advertized. This is proof and I won't be considering any DT loads in the future. I'll stick to Buffalo Bore and Underwood.
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