Tweet
not many 303 shooters here but i'll put this up anyway . i've found a source .
didnt have time too chrono all of it (got '69 , '70 ,'71 ,'73 ,'75) just set a big piece of cardboard out @550 yards and fired off my elbows , on the bench , 10 rounds of the HXP . headstamped HXP/'71 . my bore was stripped clean and the chrono #s reflect this . VEL@15ft. , 55degF windy but trees blocking the wind , i put every round on the big (2'x 3')cardboard right at POA , about 9"/10" for 6 ( blew 3 shots lower and one really low my fault).
this ammo is from the guy that has thousands and thousands :
HXP/ '71 MK7z
AVE.____2443fps
HIGH____2472
LOW____2379
ES________93
SD________27
1) 2379fps
2) 2415
3) 2438
4) 2460
5) 2447
6) 2459
7) 2464
8) 2457
9) 2442
10)2472
GOOD STUFF
the bullet is 1.215" LOA , nose length 0.800" / .312" at the widest , 8s - tangent radius ogive .
the BC of the HXP mk7 and L1A1 ball is .257 G6 @2400fps . @2500fps , .260 G6 . neither have the MK7 fiber or aluminum tip and penetrate materials same as 762x51 LCB . no fast yaw in meat like the light-tip MK7 . the L1A1 bullet has a thicker jacket is all .
the MK7s' with aluminum tips give as little as HALF the penetration of sheetmetal as the others . the aluminum seems to act like a cushion or pad .
HXP/ '89 L1A1 from a couple years ago @80+ deg. F.
AVE. ___2471fps
HIGH ___2497
LOW____2436
ES________61
SD________17
i believe the same thing happend here , clean barrel = lowered vel. for a couple shots .
[ May 03, 2004, 03:37: Message edited by: Yoda-Dad ]
didnt have time too chrono all of it (got '69 , '70 ,'71 ,'73 ,'75) just set a big piece of cardboard out @550 yards and fired off my elbows , on the bench , 10 rounds of the HXP . headstamped HXP/'71 . my bore was stripped clean and the chrono #s reflect this . VEL@15ft. , 55degF windy but trees blocking the wind , i put every round on the big (2'x 3')cardboard right at POA , about 9"/10" for 6 ( blew 3 shots lower and one really low my fault).
this ammo is from the guy that has thousands and thousands :
HXP/ '71 MK7z
AVE.____2443fps
HIGH____2472
LOW____2379
ES________93
SD________27
1) 2379fps
2) 2415
3) 2438
4) 2460
5) 2447
6) 2459
7) 2464
8) 2457
9) 2442
10)2472
GOOD STUFF
the bullet is 1.215" LOA , nose length 0.800" / .312" at the widest , 8s - tangent radius ogive .
the BC of the HXP mk7 and L1A1 ball is .257 G6 @2400fps . @2500fps , .260 G6 . neither have the MK7 fiber or aluminum tip and penetrate materials same as 762x51 LCB . no fast yaw in meat like the light-tip MK7 . the L1A1 bullet has a thicker jacket is all .
the MK7s' with aluminum tips give as little as HALF the penetration of sheetmetal as the others . the aluminum seems to act like a cushion or pad .
HXP/ '89 L1A1 from a couple years ago @80+ deg. F.
AVE. ___2471fps
HIGH ___2497
LOW____2436
ES________61
SD________17
i believe the same thing happend here , clean barrel = lowered vel. for a couple shots .
[ May 03, 2004, 03:37: Message edited by: Yoda-Dad ]
Comment