Bent case mouth on 45-70 ammo QUESTION???

Mossyoak1957 · Post by **Mossyoak1957** » Sun Apr 17, 2011 5:02 pm

Got a Browning 1886 rifle in 45-70 last week took it to the range today for the first time and noticed when shooting Factory Remington ammo with the 405 gr. after firing them the case mouth was flat on one side.
When I shot some Factory Federal 300 gr. ammo there was just a slight flat spot on the case mouth no near as much as the Remington 405 ammo.

Both brands of ammo shot...cycled.....ejected fine
I did read somewhere and can't find the write up to save my life that the Browning 1886 were known for this.

What causes the case mouth to bend and get a flat spot on it????

Thanks Tom

Post by **Hobie** » Sun Apr 17, 2011 5:09 pm

The extractor and ejector are such that when you work the lever a round is pulled out, flips around just so and wacks the flat into the case.

Mossyoak1957 · Post by **Mossyoak1957** » Sun Apr 17, 2011 5:33 pm

Hobie wrote:The extractor and ejector are such that when you work the lever a round is pulled out, flips around just so and wacks the flat into the case.

Hobie,
ok thanks!!....now I can sleep tonight....lol
Tom

jnyork · Post by **jnyork** » Sun Apr 17, 2011 5:40 pm

Hey, Tom, did you fire one and very carefully extract it and examine it before it got ejected to see if it comes out of the chamber like that? This must be happening after ejection somehow.

Edit: OOOPS already answered, sorry 'bout that.

Mossyoak1957 · Post by **Mossyoak1957** » Sun Apr 17, 2011 5:45 pm

jnyork wrote:Hey, Tom, did you fire one and very carefully extract it and examine it before it got ejected to see if it comes out of the chamber like that? This must be happening after ejection somehow.

Edit: OOOPS already answered, sorry 'bout that.

I did notice when I would eject very slowly there was no dent at all,but when I did fire 3 shots real fast they did make the case mouth out of round.

Redman2006 · Post by **Redman2006** » Mon Apr 18, 2011 7:15 am

I have the same issue as well. Is there an adjustment that can be done to prevent this, or is it just the nature of the beast?

Thanks

Post by **Hobie** » Mon Apr 18, 2011 7:38 am

Redman2006 wrote:I have the same issue as well. Is there an adjustment that can be done to prevent this, or is it just the nature of the beast?

Thanks

How is it a problem? Does the flat prevent the case mouth from entering the reloading die? What can you do? Slow down. If you need to shoot fast, and I mean NEED, then you will and you won't care about even 6 cases flattened beyond recognition. If you don't NEED to, then you don't HAVE to.

It is MUCH more important that the case always be extracted than it is that the case look all nice and round. What is happening is that the extractor hook is holding the case just a bit too long. Some have polished the inside of the hook so that it releases a hair sooner but don't change the angles. Also, POLISH doesn't mean FILE.

By the way, MY 1886 SRC doesn't do this.

Terry Murbach · Post by **Terry Murbach** » Mon Apr 18, 2011 10:09 am

THIS IS A NON-ISSUE !!! IT IS PRECISELY WHY GOD INVENTED FL [ FULL LENGTH...] SIZE DIES. THIS IS ONE OF THE BEST EXAMPLES OF YOU FELLOW'S PII I HAVE EVER SEEN. C' MON.....THINK !!!

jnyork · Post by **jnyork** » Mon Apr 18, 2011 3:33 pm

Terry Murbach wrote: . THIS IS ONE OF THE BEST EXAMPLES OF YOU FELLOW'S PII I HAVE EVER SEEN. C' MON.....THINK !!!

OK, I'm new around here and I was raised under a rock. What the heck is "you fellow's PII".

hammerman · Post by **hammerman** » Mon Apr 18, 2011 4:00 pm

My Browning 1886 SRC does the same thing. It's the new shell coming up that does it, and it only does it if you work the lever fast. It still goes through the die fine.

Nate Kiowa Jones · Post by **Nate Kiowa Jones** » Mon Apr 18, 2011 4:50 pm

Sorry Terry,
But I disagree. Some guns with certain ammo will ding the case mouths so bad the case life is shortened. They tend to split prematurely. It's not as bad with the 86 as it is with the 92's. Particularly in original cals.
Twenty years ago if you were into CAS just about everyone had a Rossi 92 and a few people had the 44-40 Rossi 92`s. Back then, 44-40 brass was hard to find. You had to buy new 44-40 ammo, as much as $35 a box and save the brass for reloading. The Rossi 92`s were so stiff and the 44-40 brass being thin walled, they would crush the case mouth destroying the brass.
I had to figured out how to make them work without ruining the brass. What is happening is upon opening the action, the extractor is hooked over the case rim at the top while the ejector pushes hard against the rim at the bottom. Then as the case mouth clears the chamber that heavy ejector spring rakes the case mouth over the chamber mouth and extractor cut causing the damage. The key is re-fitting the ejector so it will work with a lighter spring. Now, instead of crushing the case mouths and launching the brass into orbit it gently kicks it up and out at your feet.
The other benefit is the bump/hard spot there at that last 1/4" of closing the bolt is eliminated, too making the action much smoother.
This works for both the 92 and the 86.

Bent case mouth on 45-70 ammo QUESTION???

Bent case mouth on 45-70 ammo QUESTION???

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Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???

Re: Bent case mouth on 45-70 ammo QUESTION???