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Discussion Starter #1
Went out and was testing some 30-30 rounds I loaded 100 rounds 50 with 150 and 50 with 170 using sierra and hornady 25 of each. The load is with reloader 7 one that I have used for about 20 years but here is the rub out of 20 rounds 2 didn't go off I was using Rem primer's for the first time(CCI was my STD in this load) I bought some last year form midway 2000 to be exact (on sale) groups went from 1 1/4 to 1 3/4 inches with peep sight that about what I normally do with this marlin but haven’t had a misfire in more years than I can think of I still have 80 loaded I’m going to take them apart. What should I do with 1900 other primers? This got me shook up a little? Any one have the same problem with Remington primers hope not!
 

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I would say the problem lies in your reloading technique, not with the Remington primers. I have loaded hundreds-of-thousands of Remington primers and NEVER has one not go boom the first time it was hit by the firing pin. But I have also loaded as many Winchester, CCI and Federal primers without incident.

If you really wanna get rid of the Remington primers, I'll send you my UPS address...
 

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Does your rifle strike the primer dead center and with a good hit? I had a handgun that was a little off center and with Rem primers I had as many as 10 out of 200 that didn't fire. Tried them in a differen't gun with good centered hits and no problems so far. Haven't had any problems with the CCI, Federals or WW in that gun either, just the Rems.
 

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Discussion Starter #4
My last step before priming is to tumble the cases, I made a pick to clean any media out of the flash holes then the primers are put into a lee hand primer from there container into the flip tray on the hand primer not being touched by my hand. I had just got these primers in and can say they have NOT contacted moisture since I had them. Been hand loading since 79 and have had only one other primer problem I was buying primers pack at a time and think they had been mishandled before I got them but that another story. I've used this same system for ten of thousands of rounds and haven't had any problems. If it was just one in 20 I would have caulked it up to it was bound to happen sooner then later.
 

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Discussion Starter #5
I bought a box of Remington factory 150's and 1 in 12 had a misfire. So it's my old 336 is to blame. What could it be hammer spring? Any help most need thanks so far.
 

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Send it back to Marlin. M44 marlin started doing the same thing. They fixed it for free.
 

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It could be the hammer spring that's not hitting the firing pin hard enough. The 336 has a 2 piece firing pin. If the lever is not all the way up, the locking block will not push the rear firing pin up into alignment with the front pin. This is a built in "safety" that makes sure the locking block is holding the bolt closed before allowing a primer strike,thus firing the rifle. There are one piece light weight firing pins that the cowboy action shooters use, but a one piece pin will let the gun fire before the bolt is closed and the gun in "battery" position.....not a good thing when it happens.....creates the potential for excessive head space as the bolt has not closed fully.......could rupture a case or damage the action, rifle, and or the shooter......the average hunting rifle is better off with the 2 piece factory design IMHO.......

First, make sure the lever is all the way up.

Are you seeing any indentation on the primer where the pin is hitting it? If you are, I'd bet on the hammer spring. If you're not, it's probably the firing pin/pins or the locking block not coming into "battery".

The firing pin is easy to remove from the 336 bolt. Remove the bolt from the gun, remove the extractor, and there are 2 roll pins that will need to be punched out........clean, inspect and replace as necessary......note that the pins are groved to allow the roll pin clearance and the pins have to go back in the same way they came out or you will not be able to get the roll pins driven back in..........not to complicated.........
 

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Discussion Starter #8
thanks victorcharlie it put a dent on the primers but not as deep as the cases that went off. I have the lever all the way up for shure, sounds like it may be the hammer spring from your post. Bob
 

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Discussion Starter #10
Luckily I have 2 Marlin 336 both 30-30 and the other was in back of the safe today after work I emptied the safe and got it out. I compared the hammer spring and both were the same the bolt on the other hand was gummed up looks like dirt and WD 40 or the such was built up, I'll go and test the results after work tomorrow and see how it goes
 

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Had a Winnie pre-64

That wouldn't fire when I first got it. Tore down the bolt and the firing pin was SO sticky with old lube and funk, that it wasn't moving. Guess the guy that sold it thought she was broke real good.

Once it was cleaned, it hasn't missed a beat yet. Try cleaning everything real good. Including the firing pin channel.
 

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Discussion Starter #12
Well I started to just soak the bolt but I ended up taking it apart and it was still dirty I cleaned it up and put it back together and this afternoon it went bang 30 times and I was relieved. Thanks to every one that put some thought in it for me you’re a great bunch
 
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