DRT
08-03-09, 19:45
I shot some 5.56mm 70gr TSX SSA & .223 62gr Remington Bonded this weekend and thought I'd share the results.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030008.jpg
Weapon: Colt Sporter (circa 1993) 20" 1:7 gov't profile barrel, freefloated, 3x9x50 Nikon Prostaff scope, 4# Bill Springfield modified stock single stage trigger.
Distance: 50 yards
Temp = ~70F
Altitude = 1300ft
Competition Electronics ProChrono @ ~10'
Overcast
Position: Bench
70gr TSX by SSA:
Lot # = couldn't find a specific #, however box lid showed "May 29 2009".
2917
2976
2930
2923
2949
====
ave = 2939 (yes, they moved right along)
SD = 21.4
50yard 5-shot group (CTC) = 1.02"
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030004.jpg
While the bullet holes look like they are to the right side of the target, they are actually 3" to the left of the target on the right side on the same sheet of paper.
.223 62gr Remington Bonded:
Lot # = G15 HB30 L
2898
2923
2886
2892
2873
====
ave = 2894
SD = 16.5 (prior chrono data with same ammo previously yielded much higher SD. Guess I picked 5 good ones though you can't tell by the group size)
50yard 5-shot group (CTC) = 1.51"
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030003.jpg
69gr Federal GMM (Control Load):
Lot # = 290456W068
Not chrono'd during this outing though I've previously measured this ammo at ~2720fps out of this weapon.
50yard 5-shot group (CTC) = 0.43" ***Most accurate load in my weapon***
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030002.jpg
As a side note, this weapon typically shoots 50yard, 5-shot groups with 5.56mm 75gr TAP into 0.6"-0.75". Not bad for a gov't barreled weapon. Here's an example.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8040002.jpg
I also fired one round of remington bonded and one round of TSX into a water barrel. The Remington mushroomed with a retained weight of 54gr, the TSX mushroomed but 3 of 4 petals sheered off.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030007.jpg
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030006.jpg
One final observation. My weapon is sighted in for 75gr TAP. At 50 yards, the 62gr Remington bonded grouped ~ 1.25" to the left and ~0.5" low vs TAP. The 70gr TSX grouped ~3.0" to the left and ~ 1.0" high vs TAP. I was quite surprised by the TSX's POI shift vs TAP. I shot a quick 5 rounds of TAP to confirm 50yard zero was still valid, and it was.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030008.jpg
Weapon: Colt Sporter (circa 1993) 20" 1:7 gov't profile barrel, freefloated, 3x9x50 Nikon Prostaff scope, 4# Bill Springfield modified stock single stage trigger.
Distance: 50 yards
Temp = ~70F
Altitude = 1300ft
Competition Electronics ProChrono @ ~10'
Overcast
Position: Bench
70gr TSX by SSA:
Lot # = couldn't find a specific #, however box lid showed "May 29 2009".
2917
2976
2930
2923
2949
====
ave = 2939 (yes, they moved right along)
SD = 21.4
50yard 5-shot group (CTC) = 1.02"
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030004.jpg
While the bullet holes look like they are to the right side of the target, they are actually 3" to the left of the target on the right side on the same sheet of paper.
.223 62gr Remington Bonded:
Lot # = G15 HB30 L
2898
2923
2886
2892
2873
====
ave = 2894
SD = 16.5 (prior chrono data with same ammo previously yielded much higher SD. Guess I picked 5 good ones though you can't tell by the group size)
50yard 5-shot group (CTC) = 1.51"
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030003.jpg
69gr Federal GMM (Control Load):
Lot # = 290456W068
Not chrono'd during this outing though I've previously measured this ammo at ~2720fps out of this weapon.
50yard 5-shot group (CTC) = 0.43" ***Most accurate load in my weapon***
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030002.jpg
As a side note, this weapon typically shoots 50yard, 5-shot groups with 5.56mm 75gr TAP into 0.6"-0.75". Not bad for a gov't barreled weapon. Here's an example.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8040002.jpg
I also fired one round of remington bonded and one round of TSX into a water barrel. The Remington mushroomed with a retained weight of 54gr, the TSX mushroomed but 3 of 4 petals sheered off.
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030007.jpg
http://s773.photobucket.com/albums/yy19/ghostrider1krr/bullet1/?action=view¤t=P8030006.jpg
One final observation. My weapon is sighted in for 75gr TAP. At 50 yards, the 62gr Remington bonded grouped ~ 1.25" to the left and ~0.5" low vs TAP. The 70gr TSX grouped ~3.0" to the left and ~ 1.0" high vs TAP. I was quite surprised by the TSX's POI shift vs TAP. I shot a quick 5 rounds of TAP to confirm 50yard zero was still valid, and it was.