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View Full Version : Results at 50 yards w/Colt LE6920


HermanH
07-04-2012, 8:43 AM
For the last month, I've been busy hand-loading about 100 rounds of ammo, some with the old beam scale using traditional methods, and some using a brand new RCBS Chargemaster 1500. On Tuesday our range was open to the public so I went over with my hand-loads and leftover ammo: 10 rounds of boxed Winchester, 55gr fmj left over from last month, 20 rounds of boxed UMC Remington 55gr JHP).

The original sight-in last month was at 25yards with just the Aimpoint PRO. This time I moved the target out to 50 and installed a Bushnell 3X and had to make a lot of adjustments as you'll see on the target - started off low and to the right. I didn't think moving it 2x as far would result in the RDS being off that much. The magnifier itself has adjustments but it's more for centering the magnifier to the red dot; it doesn't affect the POI. To ensure this, I went back to iron sights and they are adjusted. So using the iron sights as a reference, I moved the red dot until I had it on the X . The results aren't bad for someone like me, 3 months into shooting a .223 rifle:

http://home.comcast.net/~a5afterb5/images/Firearms/colt_50yds.jpg

http://home.comcast.net/~a5afterb5/images/Firearms/colt_50yds_2.jpg

Here are the chrono results:

Remington/UMC 45gr. : 3216, 3217, 3223, 3160, 3202, 3215, 3186, 3195, 3183, 3228. Avg. 3202 ft./sec.
Winchester 55gr. : 3006, 3045, 3014, 301, 2996, 3015, 3017, 3009, 3000. Avg. 3012.56 ft./sec.

Handloads 55gr/23.1gr H322 (old powder measure method): 2792, 2896, 2898, 2876, 2916, 2834. Avg. 2868.67 ft./sec.

Handloads 52gr./23.1gr H322 (old powder measure method): 2791, 2940, 2818, 2828, 2863, 2911, 2828, 2891. Avg. 2858.75 ft./sec.

Handloads 55g./23.1gr H322 (NEW Digital Powder measure method): 2759, 2856, 2835, 2847, 2835, 2898, 2893, 2856, 2884, 2888. Avg. 2855.10 ft./sec.

By far, the use of the digital powder measure yielded the most consistent speeds (the chrono itself does have a fudge factor of about 3ft. sec. IIRC which is a .03% variance at these levels.) In any event, the Colt does well with a variety of ammo it appears, which is fine because sometimes, you don't have time to handload ammo so off-the-shelf will work fine in a pinch.
One other thing to note is the additional 100-200ft./sec. of the boxed ammo is noticeable as my magnifier kept reminding me - the eye relief of the Bushnell is rather poor. I'm within 1" of it. I didn't think about the fact that I have protective glasses between me and the mag so it hit it every time. On a .22LR, this would work out perfectly since there's nearly no recoil in the M&P 15-22. I may look into another magnifier with better eye relief (if it's possible) and move the Bushnell over to my S&W down the road.

The next step: 100 yards just to see what it can do.

6mmintl
07-04-2012, 12:47 PM
That is a terrible waste of a good bullet at 50 yards, come shoot the 200 meter silhouette rifle match (offhand) at Chabot the first Sunday of every month.

Don’t post an excuse like "You have to practice" before shooting a match, practice on the 200 meter line.

valley82
07-04-2012, 1:39 PM
Pics of your groups?

mattt
07-04-2012, 4:58 PM
50 yards? maybe you could shoot at 25 yards or even better 10 yards. 50 yards is almost Long Range :rolleyes:

MXRider
07-04-2012, 5:01 PM
That is a terrible waste of a good bullet at 50 yards, come shoot the 200 meter silhouette rifle match (offhand) at Chabot the first Sunday of every month.

Donít post an excuse like "You have to practice" before shooting a match, practice on the 200 meter line.

Is this open to the public? I would like to come check this out.

Sent from my PC36100 using Tapatalk 2

kendog4570
07-04-2012, 8:06 PM
Is this open to the public? I would like to come check this out.

Sent from my PC36100 using Tapatalk 2


WIDE open. Come and shoot and have some fun. Be there around 8:30-9:00 am. Bring a non-magnum highpower rifle of almost any flavor, and 60+ rounds. Eyes and ears, of course.
Bring a friend, too.