GlockTalk.com
Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.

 
  
Reply
 
Thread Tools Display Modes
Old 11-15-2010, 17:12   #1
GlockJD
Senior Member
 
GlockJD's Avatar
 
Join Date: Jan 2002
Location: Tucson, AZ
Posts: 529


30-06 chrono numbers

Working up my .30-06 loads I ran into some weird numbers through the chrono. I am assuming the second string is bad data, I was having a lot of errors saying it missed the start sensor and only caught the stop sensor for the first couple sets. The ones that read showed almost 500 over all the rest and they were the lightest loads?

String 1 was supposed to be 52.5 gr of IMR4350 but it errored 4 times and 1 time showed 2570 but it got erased from memory. all of my 53gr loads errored and finally got 2 loads to show up at 53.5 and they are the ones that showed up as 3194 and 3098 for String 1. Subsequent strings went up by .5 grains to a max of 57gr. Never quite hit the 2900 fps of the books but the rifle I was using was only 22" barrel. No signs of over pressure and seems like a pretty good consistency once the chrono settled down, I really had to fine tune the angle over and over to get it reading right, a lot more than I have with pistol shooting. How do these numbers look to everyone else?

Total Strings = 8
Feet Per Second

String 1
1) 3194.0 48.0
2) 3098.0 -48.0

High: 3194.0
Low: 3098.0
E.S.: 96.0
Ave.: 3146.0
S.D.: 67.9
95%: 862.7

String 2
1) 2657.0 6.7
2) 2656.0 5.7
3) 2638.0 -12.3

High: 2657.0
Low: 2638.0
E.S.: 19.0
Ave.: 2650.3
S.D.: 10.7
95%: 32.6

String 3
1) 2690.0 -1.8
2) 2702.0 10.2
3) 2690.0 -1.8
4) 2685.0 -6.8

High: 2702.0
Low: 2685.0
E.S.: 17.0
Ave.: 2691.8
S.D.: 7.2
95%: 13.2

String 4
1) 2725.0 0.5
2) 2724.0 -0.5

High: 2725.0
Low: 2724.0
E.S.: 1.0
Ave.: 2724.5
S.D.: 0.7
95%: 8.9

String 5
1) 2735.0 -18.0
2) 2761.0 8.0
3) 2782.0 29.0
4) 2751.0 -2.0
5) 2736.0 -17.0

High: 2782.0
Low: 2735.0
E.S.: 47.0
Ave.: 2753.0
S.D.: 19.5
95%: 27.1

String 6
1) 2763.0 9.8
2) 2735.0 -18.2
3) 2750.0 -3.2
4) 2749.0 -4.2
5) 2769.0 15.8

High: 2769.0
Low: 2735.0
E.S.: 34.0
Ave.: 2753.2
S.D.: 13.3
95%: 18.5

String 7
1) 2765.0 -11.8
2) 2780.0 3.2
3) 2788.0 11.2
4) 2753.0 -23.8
5) 2798.0 21.2

High: 2798.0
Low: 2753.0
E.S.: 45.0
Ave.: 2776.8
S.D.: 18.0
95%: 25.0

String 8
1) 2797.0 0.2
2) 2812.0 15.2
3) 2779.0 -17.8
4) 2788.0 -8.8
5) 2808.0 11.2

High: 2812.0
Low: 2779.0
E.S.: 33.0
Ave.: 2796.8
S.D.: 13.7
95%: 19.0

(End Of Data)
__________________
.40 S&W Club, #153 (G23)
Big Dawg Club, #1530 (G21)

"You never need a gun until you need a gun, and when you do, you need it more than anything else in the world."
GlockJD is offline   Reply With Quote
Old 11-15-2010, 18:08   #2
rg1
Senior Member
 
Join Date: Aug 2003
Location: Kentucky
Posts: 427
Velocities look normal for 30-06 150 grain bullets using IMR 4350. The high readings at low powder charges must have been reading the muzzle blast? The other groups look normal and velocity at 57 grains is about what you'd expect to get even in a 22" barrel. You shooting 150's or 165's?
rg1 is offline   Reply With Quote
Old 11-15-2010, 18:32   #3
GlockJD
Senior Member
 
GlockJD's Avatar
 
Join Date: Jan 2002
Location: Tucson, AZ
Posts: 529


forgot to mention that, 165 gr Hornady SSTs. I was thinking the same with the muzzle blast so I moved the windscreens further out but errors were just as bad, ended up moving them in closer, closer to 10 feet instead of 12 that I started at and it finally settled down. It was a little breezy to start and I wondered about that but it got worse as the day went on and yet got more consistent.
__________________
.40 S&W Club, #153 (G23)
Big Dawg Club, #1530 (G21)

"You never need a gun until you need a gun, and when you do, you need it more than anything else in the world."
GlockJD is offline   Reply With Quote
Old 11-15-2010, 23:15   #4
albyihat
Senior Member
 
Join Date: Aug 2007
Location: SW Montana
Posts: 329
I'm a big fan of 4350 and the 165gr SST great accuracy, good expansion, and cheap. I've taken many deer and elk with this combo.
albyihat is offline   Reply With Quote

 
  
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




All times are GMT -6. The time now is 23:02.




Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 1,096
296 Members
800 Guests

Most users ever online: 2,672
Aug 11, 2014 at 2:31