Anyone shooting an AR in .20 practical?

[hogpatrol]

I have info for the bolt version but looking for some starting to proven loads for the .20 Practical in an AR platform, 1-10 twist. Plan on using 844 pulldown or VV135. I bought a box each of 39 sierras, 40 hornadys and 40 Bergers for testing. Neck sizing to .225. TIA for any info, HOG

 

[itchyTF]

I've got an AR in .20 Practical with an 11 twist. I decided on the 32 gr BK for the higher speed although I'm keeping them at about 3,850. I use 24.6 gr of VV N133.

 

[rcw3]

Favorite load for me is 24 gr of N133, with Sierra 32 gr BlitzKings, BR-4 Primers and Remington brand 223 Rem brass necked down to 20 cal. with the bullets around 2.245" OAL (which is about .010" off the lands with my chamber). I use this for test firing customer uppers and that load has yielded so many itty bitty groups with a broad variety of customer uppers it's just hard to ignore it. You can probably go a little hotter with it but I like loads that are easy to do and that shoot well in all weather conditions and temperatures so I have stayed with what I posted and the great accurate groups keep coming.

Robert
http://www.6mmar.com/20_Practical.html

 

[itchyTF]

A 5 shot group out of my AR Practical using 35gr Bergers. Probably couldn't do it again! The grid is 1/4" and the range was 100 yds.

 

[hogpatrol]

Itchy, That is some great shooting! What brass and final neck bushing are you using.
I'm "itchy" to get mine going, just waiting for a neck only sizing die.

 

[itchyTF]

Hog,

I use LC (mostly 02) brass and since I don't turn it I need to use the expander button (carbide). The neck OD on loaded cases measures in the range of .226 - .228. I use a .224 neck bushing.

Maybe I should turn them to make them more consistent!

 

[GrocMax]

WC844 and a 39-40g bullets start at 24.5g-25g powder. My lot of 844 has been a little 'slower' than H335. Add maybe .4g for a coated bullet. All 3 of the 20 Prac barrels familiar to me like a jump of about 20-25 thou.

For a reference I use 26.0-26.2 with an uncoated 34g VNE/Dogtown jumped .025" and its 3875-3900 FPS at 600ft elevation and a moderate, reasonable pressure load.