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My First AR-10T BNF Range Session
14 years 4 months ago - 13 years 4 months ago #4780
by JustMe
My First AR-10T BNF Range Session was created by JustMe
16 Jul 10, 95-98F degrees per my truck thermometer. The manual said to break in the rifle by taking single shots and cleaning after every shot up to 9 shots. Then shooting 5-shot clips and cleaning after each clip up to 30 shots. I used some store bought Win 150 & 180 grain Power Points for the barrel break in (50 rounds). Then I switched to some hand loads cleaning the barrel each time I changed powder types.
It didn’t like the store bought stuff as much as the hand loads. The best I could shoot at 100 yards with the 150 and 180 grains Win Power Points was 1 ¾H x 2W inches.
- The 150 grain Win max spread was 2” for 5-shots
- The 180 grain Win max spread was 4½” for 5-shots
- The 150 gr was also much more consistent staying between 1 ¾- 2” for each 5-shot group.
- The 180 gr Win Power Points had much more variation between each 5-shot group, some as small as 1 ¾” and others up to 4 ½”.
- 60 round break-in complete
The hand loads did much better at 100 yards.
155gr Sierra Match Kings
- 42.5 grs of IMR 3031 shot ¾W” x 1 ¼H“ 5-shot group (Avg 2656, ES 23.6, SD 10.9, AD 8.6)
- 45.0 grs of IMR 4895 shot ¾W” x 1 ½H” (Avg 2641, ES 24.4, SD 10.1, AD 7.3)
- 46.0 grs of Varget shot 7/8 W” x ½H” (Avg 2644, ES 56.1, DS 20.8, AD 14.7)
168 gr Sierra Match Kings
- 40.8 grs of IMR 3031 shot 1 ¼W” x 1 ½H” (Avg 2543, ES 46.1, SD 20.2, AD 15.
_____________________________________________________________________
30 Jul10 All following used 155 gr SMK and Varget powder. Changed Overall length (OL) and grains
- 46.0 grs, 7/8W” x 1 ¼ H” (OL 2.80) 2672 fps, SD 4.5
- 46.0 grs, 1W” x ½ W” (OL 2.855) 2638 fps, SD 26.8
- 46.5 grs, 1 ¼ W” x 1 H” (OL 2.855) 2710 fps, SD 21.0
- 47.0 grs, 1 W” x ¾ H” (OL 2.855) 2719 fps, SD 13.1
- 47.5 grs, 1 ¼ W” x 1 ¼ H” (OL 2.80) 2731 fps, SD 7.9
- 48.0 grs, ½ W” x ½ H” (OL 2.80) 2764 fps, SD 20.6 ( 4 shot = ¾” x ¾” )
__________________________________________________________________
22 Aug 10 (chronograph readings suspect, setup too close 2-3 paces)
- 46.0 grs, ½ W” x 1 ½ H” (OL 2.855) 2400 fps
- 48.0 grs, ¾ W” x ¾ H” (OL 2.855) 2805 fps, (4 shot again, one flyer)
- 48.5 grs, 1 ¼ W” x ¾ H” (OL 2.855) 2800 fps
- 49.0 grs, 1 ¾ W” x 1 ½ H” (OL 2.855) 2777 fps
_________________________________________________________
Likes Varget 46.0 grs and 48.0 grs best, 155 grs SMK
It didn’t like the store bought stuff as much as the hand loads. The best I could shoot at 100 yards with the 150 and 180 grains Win Power Points was 1 ¾H x 2W inches.
- The 150 grain Win max spread was 2” for 5-shots
- The 180 grain Win max spread was 4½” for 5-shots
- The 150 gr was also much more consistent staying between 1 ¾- 2” for each 5-shot group.
- The 180 gr Win Power Points had much more variation between each 5-shot group, some as small as 1 ¾” and others up to 4 ½”.
- 60 round break-in complete
The hand loads did much better at 100 yards.
155gr Sierra Match Kings
- 42.5 grs of IMR 3031 shot ¾W” x 1 ¼H“ 5-shot group (Avg 2656, ES 23.6, SD 10.9, AD 8.6)
- 45.0 grs of IMR 4895 shot ¾W” x 1 ½H” (Avg 2641, ES 24.4, SD 10.1, AD 7.3)
- 46.0 grs of Varget shot 7/8 W” x ½H” (Avg 2644, ES 56.1, DS 20.8, AD 14.7)
168 gr Sierra Match Kings
- 40.8 grs of IMR 3031 shot 1 ¼W” x 1 ½H” (Avg 2543, ES 46.1, SD 20.2, AD 15.
_____________________________________________________________________
30 Jul10 All following used 155 gr SMK and Varget powder. Changed Overall length (OL) and grains
- 46.0 grs, 7/8W” x 1 ¼ H” (OL 2.80) 2672 fps, SD 4.5
- 46.0 grs, 1W” x ½ W” (OL 2.855) 2638 fps, SD 26.8
- 46.5 grs, 1 ¼ W” x 1 H” (OL 2.855) 2710 fps, SD 21.0
- 47.0 grs, 1 W” x ¾ H” (OL 2.855) 2719 fps, SD 13.1
- 47.5 grs, 1 ¼ W” x 1 ¼ H” (OL 2.80) 2731 fps, SD 7.9
- 48.0 grs, ½ W” x ½ H” (OL 2.80) 2764 fps, SD 20.6 ( 4 shot = ¾” x ¾” )
__________________________________________________________________
22 Aug 10 (chronograph readings suspect, setup too close 2-3 paces)
- 46.0 grs, ½ W” x 1 ½ H” (OL 2.855) 2400 fps
- 48.0 grs, ¾ W” x ¾ H” (OL 2.855) 2805 fps, (4 shot again, one flyer)
- 48.5 grs, 1 ¼ W” x ¾ H” (OL 2.855) 2800 fps
- 49.0 grs, 1 ¾ W” x 1 ½ H” (OL 2.855) 2777 fps
_________________________________________________________
Likes Varget 46.0 grs and 48.0 grs best, 155 grs SMK
Last edit: 13 years 4 months ago by JustMe.
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- BUILDING MY SASS
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14 years 4 months ago #4797
by BUILDING MY SASS
Replied by BUILDING MY SASS on topic Re:My First AR-10T BNF Range Session
Hey JM...great report...thanks for sharing...
On the trigger...YOU will get used to it...I love mine...
For the "store bought" stuff...I have never had much luck with Winchester, I found it to dirty...You should give Hornady a try...
Most of mine (ok all) I get online...no one around here carries it..
Try the 168 gr A-max....You will love it...
BMS
On the trigger...YOU will get used to it...I love mine...
For the "store bought" stuff...I have never had much luck with Winchester, I found it to dirty...You should give Hornady a try...
Most of mine (ok all) I get online...no one around here carries it..
Try the 168 gr A-max....You will love it...
BMS
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