20 caliber build.

[bfarms]

Lots of variables come into play here… powder used, internal dimensions of the brass, seating depth, barrel actual bore size…

Ok…. Let me rephrase what I asked. I get all of that. I've never been around a 20gt. I have no idea the case capacity. Or anything else about one for that matter. So instead of looking it up I figured I'd ask here and get a rough idea on velocity difference if there is any. I know all of that comes into play. Im not asking for exact numbers

 

[adam.imberi]

We found the easy button on the .20 and the 55 gr Bergers. Designed the reamer and had JGS grind it. 20 GT shooting the 55 gr Bergers comfortably at 3,850 out of a 22" barrel.
SAC die, Wilson in-line seat die and using 22 GT brass with one pass in the SAC due to bring it down to .20 cal. Feeds like butter out of an AI style mag. Will use Lapua 6 GT brass when it hits the streets later this year, but can't argue with the results so far.

Accuracy is astounding at both 500 and 1,000 yards. Yes, I shot it for group at those distances.

My rifle is built on the Terminus Apollo.

Feel free to contact me if you would like have a barrel done.

Two different groups at 518 yards, and one group at 1,003 yards.

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I am interested in more information on your 20gt.

I am currently running a 20-250 with the 55s. But am wanting to try a 20gt also. Message me so I can get in touch etc.

Adam

 

[Hugnot]

I like my .20P & .204R with 11 twist &40 grain bullets. My opinion is that 55 grain .204 bullets, (like faddy) don't provide a good enough (significant) improvement over 70 -80 grain bullets in a speedy .224 case like .22-.250. Should you decide on a .20P, utilizing cheap available .223 brass, accept neck turning to assure concentric necks, minimal runout, & uniform neck tension. I think the .20's are best with 40 grainers at 3,800 fps plus up to 400 yards or so to assure minimal point blank holds on small targets.