Marlin 30AW swollen cases /extraction issues

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YunGun

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Hello all! I'm a new member, first time poster, somewhat new to firearms in general & a novice handloader. I almost posted this in the reloading section, but thought this a better fit given the circumstances... Feel free to move it if warranted.

My father-in-law gave me a Marlin 30AW lever-action rifle chambered in .30-30Winchester that had been sitting unused in a closet for many years. Despite it's unknown history, the rifle appeared to be in like-new condition save some very minor surface rust that cleaned up nicely with some 0000 steel wool. The gun functioned flawlessly through several trips to the range using a variety of Federal & Winchester factory rounds; the only problem I've encountered was coming up with the $$ to continue feeding it as much as I wanted to shoot it! :D

...So, I eventually decided to try my hand at reloading, with the help of a friend who has been reloading for years. While in hind-sight this may not have been the best place to start, I ultimately decided to try loading up some of the Hornady 160gr FTX bullets to see how they performed.

As this was my first time reloading ammo, I was relying heavily on my friend's experience in regards to the initial load workup. We did not have any Hornady-specific load data available at the time :uhoh: but he assured me that using the 170gr jacketed bullet data in his Lee book should serve as a safe starting point to work up the load data. We found a recipe for Reloader 15 (which was the only powder he had on hand), backed down a few steps from the listed data & loaded up a batch for testing. (IIRC, the first batch was ~31-32gr RL-15 under the Hornady 160gr FTX with CCI 200 primers in once-fired Winchester brass).

I finally made it to the range to try out our completed rounds & as soon as I touched off the first round, I suspected it was too hot. As I worked the lever to eject the spent casing, I found that the lever wouldn't budge - the casing had expanded so far that the extractor couldn't remove it. After eventually popping the extractor hook off of the rim of the case I was able to open the action, only to find a loose, flattened/cratered primer inside the receiver!:what: Wound up having to field strip it & tap the spent casing out with a rod down the barrel. Aside from a good scare, there was no apparent damage to the rifle or myself, so I immediately decided the rest of the rounds were unsafe & took them home to be disassembled.

Did some more digging & eventually discovered Hornady load data for this particular bullet that indicated a max load of 29.8gr RL-15!! :eek:
I rebuilt the rounds using the lowest listed data point (27.2gr RL-15 @ 1800FPS) confident that would resolve my issues, while taking to heart the importance of using projectile-specific load data & cross-referencing data sources!!

On the next range trip I discovered that, much to my surprise, the same problem occurred with the new, lighter load; after firing, I was unable to extract/eject the spent shell casing. Again, I had to field strip the rifle & tap the shell out. This time the primer was still in the pocket at least, & while the primer was still somewhat flattened, the firing pin indentation looked relatively normal with minimal cratering. Somewhat mystified at this point, I proceeded to fire a few rounds of Winchester 'Super-X' factory rounds for comparison & found that they too got stuck in the chamber.

Given that I have been unable to extract/eject *any* spent shell casings since that first over-pressure round, I fear that the rifle has indeed sustained some damage that is not visually apparent (at least not to my untrained eye). While I suspect that I'll ultimately need to have a qualified gunsmith diagnose/repair it, I'm hoping that some of you more experienced shooters might be able to offer some insight as to what is going on here (largely just for my own education/experience, but on the off-chance I might be able to avoid a trip to the 'smith).

While it has been suggested that I might be better off sticking to traditional flat/round nose jacketed bullets for entry-level reloading (which I'm not opposed to), that doesn't address the fact this is now also occurring with factory loaded ammunition. I've heard suggestions that this could be caused by anything from a headspacing issue to a faulty extractor, & my head is now swimming with well-intentioned (but probably incorrect) theories & I lack the knowledge/experience to definitively sort the possible/likely from the impossible/unlikely theories.:confused::banghead:

Sorry for the extremely long post, but I've been trying to wrap my head around this problem for a few months now & trying to give you guys 'the rest of the story'...
 
It could be something as simple as a rusty chamber, or it could be way more serious damage.

Very possible the over-pressure load swelled the chamber.

The weakest link in a lever-action is the front receiver ring where the barrel threads and mag tube hole go through it.

If the chamber expanded that much, you may also have a cracked receiver ring between the barrel threads and mag tube hole..

I'd find a gunsmith, and would shoot it no further until you get it checked out.

I've heard suggestions that this could be caused by anything from a headspacing issue to a faulty extractor,
Fraid not.
The extractor apparently is working as designed, as you can't open the lever with a case stuck solidly in the chamber.
Excess headspace will result in case head seperation, not hard or impossible extraction.



only to find a loose, flattened/cratered primer inside the receiver!
The 30-30 is SAAMI pressure rated it 42,000 PSI.
It takes upwards of 70,000+ PSI to expand a case head to the point a blown primer falls out.

rc
 
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Blowing the primer out of the pocket generally occurs at pressures substantially greater than a proof load. At this point you need to assume that your experiment bulged the chamber, as well as possibly affecting the headspace by setting back the bolt locking surfaces.
Years ago you could safely assume that the powder load for one type of 170gr. bullet would be OK for any other. With the introduction of all-copper and internal belted bullets that can develop far higher pressures due to bore friction, that assumption goes out the window. Today, load information must be for the specific powder and bullet.
Sorry for your Loss, hope your gun can be repaired. Be thankful that Marlin over-engineered your rifle so that it stayed in one piece. Your Guardian Angel was on overtime...
 
Thanks for the replies!

As much as I was hoping for a different response, that's about what I expected. :(

The 30-30 is SAAMI pressure rated it 42,000 PSI.
It takes upwards of 70,000+ PSI to expand a case head to the point a blown primer falls out.

Yeah, as soon as I saw that loose primer in the receiver I realized that things could have easily have turned out differently. As upset as I am over the likely damage to the rifle (not to mention severely shaking my confidence in my buddy's reloading prowess), I just keep reminding myself better a rifle than an arm (or a new cranial implant!:eek:) & decided that I would treat this as a positive learning experience that I'm not likely to forget!
 
I bought a Springfield modle 840 bolt actiom 30-30 used from a gun store,first fireing I coulden't pull the bolt back after fireing.took back where I bought it and they sent it to a gunsmith who red taged it because of a bulgded chamber,said prolly from pumped up reloads.,gun shop paid to have it rebarreled and it shoots and funtions great now,someone ruened this barrell then traded it in.biker
 
If this is happening every time you try to eject a cartridge/mty case, you might have a sprung breech! My Pop done that with a Savage '99 in .243, reloading too hot! Sprung breech, parts only. You also might find someone who knows reloading, not "guessing" about how much powder goes in this rifles loads!
 
i did not check my lee manual against your data, but i have found that much of the data contained in the lee maual are on the hot to very hot side. i have found loads in there where lee's starting loads are higher than the maximum loads in other manuals. i would advise you and your buddy to get a different manual!
 
Update

Finally found a local 'smith to take a look at it; he confirmed that the chamber appeared to be swollen, & further stated that he'd never seen a problem quite like this in all his years working on guns! LOL, leave it to me!:rolleyes:

Anyway, I picked up a factory replacement barrel through Numrich & had him install it - all for just over a C-note.

Just took it back out to the range for the first time last night (had to put down a few rabid milk jugs :D)& it appears to be working well - No stuck cases with factory ammo, & even the last two FTX rounds I'd saved from the previous batch (with the mfr. listed starting load of 27.2 gr RL-15) seemed to work fine.

Guess I'll very cautiously resume load development with this lesson in mind.
Thanks again for everyone's input!

Happy shooting & stay safe!
 
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