Spindle VS. 7mm. RSAUM at 1000 yards

[RDavies]

Almost makes a case for electronic targets.

It would take a heck of a lot more than this for me to ever want to use ETs for competition.

 

[RDavies]

I wonder if the bullet actually did go all the way through the target but since it likely became unstable and hit the berm sideways, it might have bounced back? Reason I say this is when I was pulling targets recently, a bullet hit the spotter and blew a big chunk in the target but bounced back a second or two later to within a few feet of where I was standing. I didn't go forwards of the target to pick it up, but took it back after shooting finished.

 

[carlsbad]

7 saum at 1000 yards still have 1200 ft-lbs energy--this is the muzzle energy of a 223. I reject all explanations that violate the laws of physics.

 

[davidjoe]

I wonder if the bullet actually did go all the way through the target but since it likely became unstable and hit the berm sideways, it might have bounced back? Reason I say this is when I was pulling targets recently, a bullet hit the spotter and blew a big chunk in the target but bounced back a second or two later to within a few feet of where I was standing. I didn't go forwards of the target to pick it up, but took it back after shooting finished.

I believe it went through the target. It hit the spindle and canted. Probably hit the berm sideways at 800 fps and bounced back, because it was neither on course for the “rabbit hole” nor point first to penetrate. The nose was slightly deformed as striking the spindle would do.

 

[243Mendoza]

Thanks Chris, We were told Thomas had his RSAUM with him, but that doesn't mean he was shooting it, I suppose. Plastic spindle, for sure. Mine was hot glued to the disc, but can't say if the one struck was or not.

Assuming 1700fps at the target and it takes 10 milliseconds for the bullet decel, the force on the spotter would be 135lbs. Can the spotter and target backing resist this force?

 

[XTR]

It had to be a rebound from the berm, but the berms at Oak Ridge are not particularly close to the pits. Some kind of odd ricochet, that's for sure.

I miss with you guys, wish I was there.