SlingShotting

Hakaman · Post by **Hakaman** » Mon Jan 09, 2012 10:05 pm

Here is a photo of the cause of the "slingshotting" troubles I have been having.
The Win 555 bulk is a large hollow point bullet and sometimes gets hung up on
the feed ramp of my Mlll. The shaven off portion results when I give the bolt a
little help feeding the ammo. It feeds ok when the action is cycled through firing,
but when I slingshot, it hangs up. The hollow point ammo is physically quite large
as compared to CCI RN. I loaded some CCI RN and it didn't have any problems.

Post by **Bullseye** » Tue Jan 10, 2012 6:38 am

Feed ramp strikes with hollow point ammo is a continuing problem for Ruger Marks. This is one reason why they've extended the feed ramp length in the newer pistols. I suspect if you manually eject a few of the rounds that appeared to feed normally you'll see some nose deformation on those rounds too.

R,
Bullseye

blue68f100 · Post by **blue68f100** » Tue Jan 10, 2012 8:56 am

If you have the top bullet pointing up does it help any? I had some WW ammo back during the shortage, 10 boxes. About 1/2 the boxes had feeding problems (all same lot) in my MKIII or my Browning SA 22. I miced the bullets and they were running about 0.0005-0.001" over what the Fed were running. Now not all of the bullets were oversized, just some. Once I shot these up I did not buy any more WW. Now accuracy was better than the Fed bulk.

ruger22 · Post by **ruger22** » Tue Jan 10, 2012 11:26 am

How "new" is the feed ramp extension? Mine is mid-2008 production, and doesn't seem to have any problem. The few duds I've ejected haven't shown any deformation. A lot of the duds were Winchester "333" pack, which I think are the same as the "555".

The majority of my shooting is Federal HP bulk and CCI Mini-Mag HP, which both perform better than Winchester, or Remington.

blue68f100 · Post by **blue68f100** » Tue Jan 10, 2012 2:21 pm

If I recall Bullseye mentioned/showed it last year.

Post by **Bullseye** » Tue Jan 10, 2012 6:25 pm

The feed ramp extension modification has been incorporated within the last year of production. You can look at this post and see what the extensions look like http://www.guntalk-online.com/forum/vie ... 0610#30610

R,
Bullseye

Hakaman · Post by **Hakaman** » Wed Jan 11, 2012 12:17 am

This jam seems to be just happening on the slingshot into action first round.
The momentum of the cycling forces the next round right up the feed ramp.
When I shot the CCI RN there wasn't a problem. I haven't tried pointing the
first round in the mag upwards, but I think that would do the job. It would be
nice not having to do that, but that's the way it is. Probably most guns have
their quirks.
Haka