3" slugs jamming spent shell in chamber

Freyr_255

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So I picked up some Rottweil 3" brenneke slugs and tried them for the first time today. After the first shot I cranked the action and the bolt wouldn't go forward so I looked and the shell I had just fired was still in the chamber. I emptied the gun and tried to extract said shell several more times. After probably a dozen cranks it came free(was close to home with no rod to remove said shell). I looked at the shotshell and it looks to me like it's extending too long into the forcing cone, especially since it has 2 cuts on the rim from the 'fins' running down the side of the slug.

I took one more shot and had the same issue. I compared it to the 3" Federals I had fired just prior to testing these out(wasting old ammo) and they are a bit shorter after firing than the Rottweils. The Federals come in at 2.875"-2.90" after firing and the Rottweils are sort of about 2.990-3.010". Unfired rounds from the same box cycle normally.

This is not a new shotgun, it's a Maverick 88(aka mossy 500 sans options) that I carry in the field as a bear gun and have owned for about 4 years or so. I normally shoot Federal 2 3/4 out of it but have used many 3" Federal/winchester loads as well. I can't recall if I've ever used Remmington slugs as the Feds are my go-to rounds(I probably have at some point). This is the first time a shell has ever not extracted/cycled. I also called the retailer and he said that no one else has reported any issues with these slugs.

So, what are people's opinions/thoughts on potential issues here? Is this fired shell too long? I was under the impression that it should be a full 3.000" fired and the chamber should accept this, but the fact Federals measure 2.90" makes me wonder. Possibly the chamber being reamed a bit short during manufacture? Dirty? Overpressure?

Oh, also the spent shells do not always extract from the chamber when re-inserted and 90% of the time will not eject if they do happen to unchamber. It's getting easier to extract them now that it's been done a few times.

And as for the power of these slugs, they are 1 1/8oz slugs @1580fps. Federal 3" are 1 1/4oz @ 1600fps.

*edit*

Just adding on that I'm cleaning my shotgun and it has a fair amount of leading in the barrel. Not sure if this would attribute to this problem or not.
 
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A good cleaning can't hurt. If the forcing cone is crudded up it could cause some pressure issues. Scrub it out real good and give it another try.
 
A good cleaning can't hurt. If the forcing cone is crudded up it could cause some pressure issues. Scrub it out real good and give it another try.

This is actually a very good point....if it turns out to be a dirty gun I'll be facepalming and happy at the same time. :p

Given I've been putting a lot of 2 3/4" through it, there may be some heavy deposits on the cone that don't get removed in my standard cleaning.
 
The chamber needs to be cleaned even polished, i don't think your problem is the length of shell, rather the shell base and a rough chamber.
 
I always run 2 3/4" Brenneckes, don't see the advantage in the longer shells for closeup problem shooting.

Its an availability thing. I normally shoot the 2 3/4" if they are in stock, but the Brennekes I can get are only in a 3".

The chamber needs to be cleaned even polished, i don't think your problem is the length of shell, rather the shell base and a rough chamber.

This would make sense as well as these shells actually have a higher brass than the Federals. Federal brass is 0.6" and the Rottweil uses a 0.835" brass. Could be getting crimped into the chamber. Looking at it, it's definitely not polished, but neither is it terrible. Maybe I'll hook the wire brush up to my drill... :p (or just use a polishing wheel all proper like...)
 
This is why so many of us use the 2 3/4 Brennekes (for that extra warm and fuzzy of fault free use) even if we have the option of 3inch slugs, in pump action shotguns that are said to be 3inch capable.

You may wish to use another shotgun action at least Freyr, if you are going to keep these 3inch Brennekes.

My two bits........
 
Glad your employer doesn't have an idiotic "no gun in camp" rule that we're starting to see more and more of.

30 years ago you just showed up in camp, pulled your shotgun or LE No.5 out of your hockey bag, put the barrel on her and tossed it behind your bunk.
 
The chamber needs to be cleaned even polished, i don't think your problem is the length of shell, rather the shell base and a rough chamber.
^With further thought on this matter, I would tend to agree with Ben here.
If your chamber is rough, the brass could be 'welding' itself into the scratches of a rough chamber upon firing. This would cause this problem.
Polish polish polish, then test it again. If it continues to hang up, then you can point at too long a fired hull as an issue.
 
Well if I can't get these to work properly tomorrow I'm going to be sticking to the Federal 2 3/4". This is my first foray into Brenneke use as I never had a source of them before. I have 8 boxes of them sitting here that I had planned to get some sighting in/practice done with, but that is looking like it may not happen.

The part that is pissing me off is I was planning on going out prospecting tomorrow and carrying these new rounds, now it looks like I get to spend the day f*king with these rounds.

As for looking at other actions....well...this one has held up well to date and I have yet to hear of any inherent problems with them. To me this is more important than getting a new gun I have to run through it's paces before I trust it in the field. A couple shots of ammo in an apparently dirty gun doesn't make me jump to buying something new. I think that the dirty part could be from getting it a bit toasty on that last round of Federals I shot...I was doing 5 shot rounds at random height close range targets(clays on sticks jammed in the ground).

So ya, maybe I'll polish the chamber a bit tonight and see if this solves my problems.
 
Glad your employer doesn't have an idiotic "no gun in camp" rule that we're starting to see more and more of.

30 years ago you just showed up in camp, pulled your shotgun or LE No.5 out of your hockey bag, put the barrel on her and tossed it behind your bunk.

Oh I have a rant on this that I put into an e-mail last night at 3am I was going to send into Canadian Reload radio today when I got around to re-reading it. Guess I'm not the only one noticing issues here. :p

I'm actually doing this for myself, not for a company. My main job switched to a minesite a month or so ago and this is my new part time job. Really this was one of my goals with moving up here(the prospecting that is). 3-3 rotations kick ass for doing things on my own time.
 
Where do you guys find these Brennekes?

The local gun shop stocks them when they can. Sort of like everything else up here...supply is the problem. As for everyone else...no idea. :p

As an update on this I just spent the last however long polishing the chamber both with a brass(copper?) bore brush on a drill and a dremel with a polishing wheel. I wouldn't say it's a mirror, but definitely not rough, and far better than it was. I'll give these a shot tomorrow and see how it works out. I'm thinking I might just head to town anyway and get some Federals and once these slugs are gone it might be the end of 3" across the board for me unless it's all I can get(now that I see how tight the tolerances on ejection actually are..not that it's been a past issue). The Federal fosters at these ranges is probably in reality just as good, especially given it has and extra quarter oz of lead at about the same velocity.

Thanks for the help guys I'll let you know how it turns out.

:cheers:
 
Still not sure what is causing this. After the cleaning and 'quick' polish job I did they no longer jam in the chamber, but they still won't always come out(2 shells did this), and none ejected from the gun properly and had to be helped out with a screwdriver. I'm guessing my chamber is reamed a touch too short as they still show minor damage on the edge of the shell where the 'fins' cut into it. Stupid high tolerance ammunition.

Either way I got it exchanged for remmy 3" because it's all they had and bought Can-tire out of Federal 2 3/4 inch 1.25oz slugs(9 boxes..). 2 3/4" inch in anything decent is hard to get in the summer it seems but Winchester 1oz are easy to find so I bought a few bulk packs to practice with. A slug at <15 yards shoots about the same no matter what it is.
 
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