Any 10/22 fans here?

[docone31]

Here is the issue.
Great rifle.
I have put in a trigger group, new barrel with Bentz Chamber, 24". Redid the stock to fit the barrel, one piece scope mount. Accurate beyond belief for a 10/22. Still having misfires, too new.
I chamfered the bolt, and reheadspaced it.
I did not pin the firing pin!!!
I tried the CCI Blazer ammo. Four and five at a time per mag, no fire! All the others did well. The Best was the Remington Thunderbolt. Every time.
Guess I gotta take her down, and drill and pin.
Thought I would get away with it.
Oh well.

[kyle623]

i was gonna say recheck your head spacing but it sounds like your sure of it.

[docone31]

Yeah.
I set the head space at .042. I like a somewhat loose fit. .040 is minimum. The barrel is Bentz Chambered and I wanted to use any ammo.
It really is the pinning the firing pin. I have sent it out to a specialist.
He does great work.
40$, chamfered, headspaced, pinned, new firing pin, new extractor and jeweled!
Should be slick.

[Tom-ADC]

Years ago I sent mine to Clarke for one of their barrels and a trigger/action job. That rifle shoots everything and is a tack driver.

[docone31]

This is what I will be getting back.
http://sites.google.com/site/quesplace/
Totally tricked out!
It is already accurate at 100yds to put an entire mag into the logo on a bowling pin.
Good enough for me.

[Frozone]

The new barrel can set back into the reciever farther than the stock one does. This moves the bolt back as well. The result is the hammer hits the bottom of the bolt before it fully strikes the firing pin. This will cause light primer strikes and misfires. Trim a little off the bolt 's lower rear face a few thous at a time. Test, trim more if needed, repeat. When the problem is solved reradius the bolt.

[docone31]

I have already chamfered and reduced the lower rear bolt edge.
Chamfering does make a difference!
I think it is the Bentz Chamber. That is know to cause issues such as I have been experienceing. Also, machineing marks within the bolt face. I will have polished that, plus bring the headspace to .040. That and pinning the firing pin should fix a bunch of stuff. Just changeing out the extractor made a big difference. The Ruger extractor is good, but the new one has a different angle. Efficiently pulls stuck shells out of the chamber.
That is how I can tell the chamber is still tight.
I have fired some cartridges with lapping compound on them. Helped some, but still some hang ups.
You are correct about the new barrel. The set back is different. I had to pin the reciever and trigger group to the stock. I put a bushing into the forestock, which I installed a set screw to tighten to the barrel. Once I did that, POA became repeateable with total tear down and cleaning.
Those rifles are addictive, and fun!

[EMC45]

I bought one years ago as a donor receiver and found it shoots so well with the all the stock parts I left it alone. Mine prefers CCI blazer. I have a fixed 4 scope on it and it is a killer!

[Finster101]

What is the preferred trigger group? I have not done mine yet, but I'm thinking it will happen soon.

James

[JIMinPHX]

Bentz chambers are a little tighter than average. If your cartridges are not going fully into battery, that could cause the problems that you are describing. I would take the barrel out of the rifle & try dropping cartridges into the chamber by hand. If they don't go freely, then you may have an ammo/chamber tolerance issue.

Since you said that some ammo worked better than other types, I would measure the diameter, length to ogive & rim height of each type & look to see what is different from one type to another. That may give you a clue to where your problem originates. If the rims are different heights, then I'd look towards headspace. If the diameters are different, then I'd look towards chamber diameter. If the length to ogive is different, then I'd look at the throat.

I'd also look at the fired brass & see what the firing pin marks look like.

You may want to take a piece of fired brass & put it back in the chamber 4 or 5 times to make a fresh firing pin mark in a few different places. If the firing pin marks vary in depth on the same case that was seated to the same depth every time, then something in your firing system is intermittent. If all the marks are shallow, then your better luck with one brand of ammo may have just been from better primer sensitivity.

[JIMinPHX]

I bought one years ago as a donor receiver and found it shoots so well with the all the stock parts I left it alone.

That was my experience too. There are plenty of aftermarket parts out there for them, but they are so good as-is that I really don't mess with them much.

I do like a take down stock for easy cleaning & for back packing. I am still looking for a 1:9 twist barrel in the stock taper, that doesn't cost as much as a new rifle would, so that I can try to get better accuracy with the 60-grain SSS ammo, but other than that, I like the plain Jane version.