short barrel .22

[ZSteinle]

I am going to be building a short barreled 22 cal rifle. I was initially going to do a 22-243 on a 22" barrel but once i started to crunch the numbers i am really not gaining anything over say a 22-250 with that short of a barrel. Now i am looking at possibly a 22br on a 18-20" barrel. What can i expect velocity wise from a shorter barrel like this in a 22br shooting say 75 or 80gr. amax's. I am going short because it will have a suppressor on the end and want to keep the oal of the gun to a minimum. Also curious about twist rates for a 22br, had a buddy that had a bad experience with a 7 twist on a 22-243 it would key hole berger 90's for some reason and 75 and 80 amax's were blowing up so really dont want to have that experience. If i did go with a 7 twist would the 75-80 amaxs stay together at the slower speeds of the 22br and will it handle the 90 berger? I shoot anywhere from 1500 above sea level to 9000' and 10degrees to 95 degrees.

 

[ab_bentley]

I can't tell you what you'll run, but I can assure you, you won't do any better than the 22BR in that short barrel. Adam

 

[JASmith]

You can use the utility at http://shootersnotes.com/calculator/velocity-estimator/ to get an estimate of the velocity for the shorter barrel, provided you have decent load data for another barrel length in the same cartridge.

The suppressor may affect the velocity a tiny but likely ignorable amount because it will tend to keep pressure on the base of the bullet for a little bit longer than if it weren't there.

 

[stacy]

I have a 20inch 1-10 twist kregier 22br thank ill be trying in a couple weeks with 52gr thur 75gr berger and hornady match 69bthp Ill keep you posted. 22br is the only way. I shoot a22 dasher with 75vld alot.

STACY

 

[Outrider27]

As posted by JASmith above, you will see a slight increase in velocity with the suppressor installed, but, as he stated, not much. Based on some extensive chronograph testing, the bullet "sees" the suppressor as an increase in barrel length and the average velocity increases with the suppressor installed. However, whatever is at the downrange end isn't really going to notice any significant difference in impact - the increase in velocity is small, and the average increase for a 10 shot string is often less than the extreme spread between the highest and the lowest velocity for the same string. The lowest average increase in velocity we saw for a 10 shot string was 4fps, the largest 30 fps for a 10 shot string, testing several different brands and loads of ammunition in the same rifle. Bottom line, the increase in velocity with the suppressor installed is real and measurable, but only of academic interest, not any real practical use or advantage.