Armory Sponsor
Posted: 7/26/2009 4:46:28 PM EDT
|
Just started reloading for my son's Marlin 336 30-30.
Rem. Brass, Rem 9 1/2 primers, 748 and Unique powders, 100 gr Sierra Plinker bullets. Out of like 30 loads (developing plinking/groundhog loads for him to get familiar with the gun) I got 7 total that didn't go boom. This was after several hits on each. One that didn't go boom the first time did go on the second hammer drop but the others will not go boom at all. At first I thought maybe I didn't seat them deep enough so the next batch I hit them a little harder and still have the same issue. All look like good solid firing pin hits to me. The only other loads I've fired through this gun have also been realods but not mine. They came from the guy I got the rifle from. Never had this problem before guys and I'm pretty sure it's something I've done. Any help/advice would be greatly appreciated. Thanks in advance! Longhunter1757 |
|
I'd suspect a bad lot of primers or maybe someone "worked on" the rifle prior to your purchase.
I'd use factory ammo (known to be GTG) to run through any new firearm, just to set a baseline. That way, I have eliminated one possible problem before taking on the next. Aloha, Mark |
|
Quoted:
I'd suspect a bad lot of primers or maybe someone "worked on" the rifle prior to your purchase. I'd use factory ammo (known to be GTG) to run through any new firearm, just to set a baseline. That way, I have eliminated one possible problem before taking on the next. Aloha, Mark Plus one on the try some factory ammo. May be a gun issue |
|
I'm 100% sure this gun hasn't been fooled with.
The other relods I used all fired perfectly. I'm thinking I either got a bad batch of primers or somehow they got contaminated. I'm going to tumble the umprimed cases again to be sure there isn't some leftover sizing lube in them that I missed. Thanks!! Longhunter1757 |
|
Quoted:
I'm 100% sure this gun hasn't been fooled with. The other relods I used all fired perfectly. I'm thinking I either got a bad batch of primers or somehow they got contaminated. I'm going to tumble the umprimed cases again to be sure there isn't some leftover sizing lube in them that I missed. Thanks!! Longhunter1757 The main spring might be weak anyway. You might have to buy or bum a box of factory loads to try. Bad primers would be way down on my list of suspects unless the packaging shows obvious signs of abuse. The cases would have gobs of lube inside, not just a tiny bit from the neck. Did you check to see if the primers are seated too deep, greater than about 0.008 inches? Also check the firing pin protrusion, it should probably protrude about 0.060 inches. |
|
I'll bet a nickle your primers DID go off.
However, the small charge of powder you used was so near the bullet that the primer flame never ignited it. Pull the bullets and see if the powder is caked near the bullet. Remove the powder, deprime and see if the primer is black from ignition. If this is the case then you'll have to put a small bit of wading on top of the powder to hold it against the primer or tilt the rifle up then not past level to fire. I've had this happen with light charges. |
|
Thanks gentlemen for all the replies.
I think I've narrowed it down to just plain bad primers which I'm going to check more closely OR and this is a big possibility, I seated them too hard and too far. I seriously doubt contamination and I'm almost 100% sure the gun is functioning fine but I will not rule out a weak mainspring just yet. Thanks again!!! Longhunter1757 |
|
Well gentlemen you were correct.
I tried a new batch with some primers that I was a little more carefull with and they all went boom. Just goes to show that you can always learn something new. Thankfully this time it only cost me a few primers. Thanks so much for your help!! Longhunter1757 |
|
Quoted:
Thanks gentlemen for all the replies. I think I've narrowed it down to just plain bad primers which I'm going to check more closely OR and this is a big possibility, I seated them too hard and too far. I seriously doubt contamination and I'm almost 100% sure the gun is functioning fine but I will not rule out a weak mainspring just yet. Thanks again!!! Longhunter1757 That was my guess. If you seat the primers to hard or with to much pressure it will break the propellant disk in-between the anvil and cup wall. |
|
Are you sure you didn't inadvertently get some oil on/in the primer? I had a dud once, disassembled it and there was oil inside the case that caked up the powder and worked its way down into the primer and neutralized it. I'd bet this is what may have happened to you.
______________ |
Armory Sponsor