300 win mag hang fires

Hotwheels81

Hotwheels81

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Hmmmm... Got a good one for y'all,

Spanky new savage FCXP 111 in .300 WM
once fired Winchester brass
Reloader-22
CCI No.250 large rifle magnum primers
Charges from 68.5gr to 71.5 by .5gr
COL is lands -.015
Nosler Custom Competition 190gr BTHP

All loads shot consistently bad (lol).
When I hit 70gr I started to get split second hang fires.
Not every round but 1 out of 3 I could feel/hear the pin hit before the shot, verified this with factory 180gr Winchester ammo so I'm not just going any crazier...

Temp was a balmy -8 today and the rifle and ammo were climitized to this for a half hour while I was enjoying some hot soup and a coffee.

None of the primers had any pressure signs... Mild flowing around the fireing pin hole but still fully radiused on the corners...

I'm guessing RL-22 is a Florida powder?
 
Your charges might also be a bit on the mild side for a .300 Winchester Magnum, and charges that are too mild can definitely cause hangfires in magnum cartridges. I'd expect Reloder 22 to work with that bullet somewhere in the 75-grain range, give or take.

Personally, I love CCI 250 primers and have never had any problems with them. If you really want to be sure, try the Winchester WLRM primer. It is basically the hottest primer on the market, and it should work in arctic cold temperatures.
 
Sierra data for the SMK 190 300 WM starts around 65gr and caps at 72.5ish max... I haven't found any data for the Nosler CC online so I wanted to climb the ladder hence the low starting point... Without a crony all I can do is take averages of load data I have in my books and work up to pressure signs.

Have some brass coming my way with Federal LRM primers in it so will compair that with my remaining 170 CCI's... Will grab a few hundred Winchesters if I find them in my travels!

Also it's my first time loading for a belted magnum so I'm going to push ahead very cautiously... I have seen excellent results with RL22 in friends rifles but now I am digging up lots of info on its temp stability from the LRH forum... Worst case I will switch to H1000, around here we see some severe temp swings in the course of a day so finding the perfect combo is paramount.
 
CanuckWR said:
I only use CCI LRM primers in mine and have not had any issues with cold. If a weak primer strike isn't suspect then I would think about P-17s light load diagnosis.
Click to expand...

Weak primer strike is not the issue, bolt is clean and dry and primers show excellent strikes, that was my first guess so I double checked against the factory loads I shot today and some others I shot a few days ago at +8 and the primer strikes match, I checked the depth of the strikes in the Winchester primers against the CCI's and they are also a match so not a lite strike issue unless I'm missing something.

Going to push my load up from 71.5 and see if things improve... Boy I'm sure lucky I live where I do, I can test rifles in sub zero temps 6 months of the year... Yay lucky me!!...
 
The Nosler manual calls for a maximum load with a 180 of 75.5 grains Reloder 22 (listed as most accurate). The same manual calls for a max load with a 200 grain bullet of 72.5 (also most accurate).

Most people have found that you can come pretty close to using 180 grain load data with a 190 match bullet because the 190 has a reduced bearing surface due to its strong boattail profile. (The Hornady manual even talks about this.)

Personally, I wouldn't hesitate to use up to 75 or 76 grains of Reloder 22 with a 190 Nosler match bullet. In fact, if I was loading with this bullet, that is exactly what I would do. (If memory serves, I've also done it with Hornady and Sierra 190s.)
 
I had an issue with a Savage Rifle once, some shots worked and some did not at all, it turned out to the Big A$$ Screw on the back of the bolt, it was just a tad loose, couldn't see it, but sure felt it when I turned the screw in with a screw driver a touch. The primers were Federal 210's by the way.

I really noticed it with the last shot I took before I fixed it that the primer had been folded in the primer pocket of the 30-06 case, that has been the strangest thing I have seen thus far with regards to reloading and ammo. After some lock-tite and a tightening of the screw, never had that problem again, even ran the shots that previously didn't fire back into the rifle and worked like they should have the 1st time, all but the folded one it went into the dud bucket.
Like I said it was not noticeable to me by just looking at it, it may have been if I had continued to use it that way some more.

How ever it does sound a little more like the brand of primers or could be just that batch/lot.
 
Now that's encouraging info, thank you very much.

Here's a pic of one if anybody is interested, I recoverd a partial bullet from the back stop I should of kept today, thin but great looking jacket...

48e476c6.jpg
 
Misfires

From someone who does a lot of cold weather shooting, I'd almost bet if you take apart your bolt you'll find grease (you did say brand spanking new, right?).
Flush all parts well with brake clean remove all grease and lightly oil.
Suspect it'll solve your problem. Run into it several times here in the winter.

Douglas
 
c-fbmi said:
From someone who does a lot of cold weather shooting, I'd almost bet if you take apart your bolt you'll find grease (you did say brand spanking new, right?).
Flush all parts well with brake clean remove all grease and lightly oil.
Suspect it'll solve your problem. Run into it several times here in the winter.

Douglas
Click to expand...

That was one of the first things I did when I bought it :D
 
The Sierra accuracy load with 190 MK is 70.4 grains of Re22 with 72.6 shown as the max.
.
I use 73.0 grains of Re22 and the 190 grain Hornady for a hunting load. Both print to the same point at 300 yards and are good for about 1.5 inches.
 
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