10/22 heavy barrels....

Guys
I will take a step back. P of PDent has made a good point.
I do have a problem loading some ammo. For example CCI stingers will not load on their own, you have to force it the rest of the way. Also, when I
engage a round, it must be fired before you can eject it.
It does however work well with all of the high end ammo. that I tried but then after all, I did buy it to shoot match ammunition.
Thane
 
With rimfire, chamber dimensions vs ammo is critical to accuracy.

So there is a compromise between a chamber that swallows anything and can function even when very fouled, or a chamber set up for max accuracy matched in size to the desired ammo. This match chamber will need more attention in cleaning and what will feed but the accuracy is much higher.

Almost all match chambers will have the throat short enough to engrave the lead bullet upon chambering. This is a good thing. yes, extraction may not be easy but usually is possible.

domestic ammo and hyper velocity ammo varies alot in dimension. They function best in the generic chamber but accuracy is also pedestrian.

The Bentz chamber is one of the better compromises for the 10/22. It seems to be less critical of ammo and will likely not cause a jam.

My GM barrel has been 100% reliable with wallyland federals and shoots surprisingly well at 100yds. Not had time to test match ammo but it seems to also function quite well.

Overall, for the money, I am very impressed with the GM barrels vs the BC. The GM barrels are noticeably more accurate then factory/BC and seem to run well.

Jerry
 
I am no styranger to Green Mountain barrels.
Five years ago I built my own version of the famous Hawkin rifle.
For four years it has given me great success. Although I never
became club champ, I had a great time and met a lot of great
shooters and rifle builders. At the same club (Trails End near Chatham)
I competed with a Green Mountain on my black powder ( off hand)
and a Lilja on my 1022 (bench rest). Very pleased with both.
Thane
 
I installed the Butler Creek heavy barrel kit. And the volquartson trigger set. It is a very boring gun to shoot. The bullets all go into the same jagged hole at fifty metres. It likes target ammo the best as that gives it the smallest group size. Point of impact doesn't change with brand of ammo.
I have also found that the factory barrel is incredibly accurate as well when the Volquartson trigger is installed.
 
10X
I understand what you are saying. Try this for more fun.
I assume you have a good scope on you rifle. With the help of a ballistics program, make a chart with elevations for every 5 yds/meters. Randomly
put up targets up from 25 to 100 yds. Using a laser rangefinder, put a singe bullet into the bull of each target on the first shot. Since I use mine for groundhogs near residential areas, this is how I practice. It's also way more fun.
Thane
 
Thane O'Dell said:
10X
I understand what you are saying. Try this for more fun.
I assume you have a good scope on you rifle. With the help of a ballistics program, make a chart with elevations for every 5 yds/meters. Randomly
put up targets up from 25 to 100 yds. Using a laser rangefinder, put a singe bullet into the bull of each target on the first shot. Since I use mine for groundhogs near residential areas, this is how I practice. It's also way more fun.
Thane
Click to expand...

Tasco 2.5x to 10x with mil dots.
I have found that with this rifle standard velocity .22 rimfire has the best accuracy only when it is faster than the speed of sound. Once it gets far enough down range, 80 to 100 metres, the groups start to open up randomly. Shooting over a chrony confirmed that the slowest MVs were likely to be further from the group centre - in any direction - at 100 metres.
Target ammo (subsonic) doesn't have the groups open up so dramatically at longer ranges.
 
10X
This is true. As a result of bullet droping down through the transonic range.
I use only match bullets (Lapua Master) for practice and hunting. The muzzle vel. is around 1070 fps. which avoids the transonic problem.
With a well placed head shot these bullets are plenty deadly at 100 yds.
Thane
 
Thane O'Dell said:
10X
This is true. As a result of bullet droping down through the transonic range.
I use only match bullets (Lapua Master) for practice and hunting. The muzzle vel. is around 1070 fps. which avoids the transonic problem.
With a well placed head shot these bullets are plenty deadly at 100 yds.
Thane
Click to expand...

Truly understated.
 
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