help solve my problem

tylerjwitty

tylerjwitty

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i built a 6.5wsm off a savage police action 300wm i used the same bolt and changed only the barrel. using 264 winmag loading data i figured i would try a few shots. the first load was h414 140 sierra 54 gr.the chorny wont work in this temp but anyways first shot stuck in the chamber. the ejector ripped off a corner of the brass while being pulled out leaving the case in. with a brass rod i removed the case. "ok" i figured that was hot so dopped down 6 grains 48 grain this time. the exact process happen once more and now im left shaking my head as too whats going wrong. 48 gr is 7 more grains then i shot out of my 260 so don't figure its still high pressure. the first primer had the firing pin dimple push out almost flush and the second had a slight ring around. rough chamber? lets hear what you have to say.
ty
 
What bullet weight? Could your necks be too thick? Could the bullet be jammed into the rifling raising pressure? Just a few things to investigate. Perhaps someone with the quick load program could check your load.
 
Firstly, I would stop using 414. Second, do you have a rough / problem chamber?

FWIW, the cartridges you are comparing to are not appropriate; the case volumes/shape are very different. Depending on the chamber, the closest cartridge would be 270 WSM, and I would start there - 4350, RL19, 4831.

However, a quick search online indicates that some guys who started with 270WSM data found even RL22 too fast and went to RL25 to keep pressure down. They also suggest that the 270WSM data should be reduced by 10% for similar weight bullets.

It concerns me that you just used 264 data. What chamber is your 6.5? 6.5-300WSM? 6.5-270WSM? There are a number of slightly different variations.

You also fail to indicate what bullet weight you are using. How much freebore do the bullets have?


ETA - Did you install this barrel yourself? What did you use to set the headspace?
 
Just my thoughts here, not scientific material.
First off, I may as well be the first, of probably many, to tell you that you should start low enough to be sure nothing like this will happen, then work up. But hey, if the truth be known, many of us have, at some time, done something very similar to this!
Regarding the neck being too tight. Take out the bolt. stand the rifle on the barrel, straight up. Drop a loaded cartridge in the chamber. If it drops down and the shoulder hits with a clunk, the neck should be OK for size.
The bullet hitting the lands when chambered will make little, or no difference in pressure.
What will raise considerable extra pressure is the neck being too long and squeezing the end of the neck tight into the bullet, when the bolt is closed.
If this is the case, then the cartridge would not drop into the chamber with a heard, clunk, in the test described above.
 
chunk it did not make. the only variation of the wsm family is the 7mm wsm. i picked a place between 264wm and 270wsm and tried it. right now a cartrige did not eject when it was loaded 10 GRAINS BELOW a 270 wsm 150 grain reccomend load off hodgdon site so im not a complete moron pudelpointer.
anyways what should a neck thickness be roughly.
guess ill have to go trim my 270wsm length sizer down on the lathe
 
i am .004 over total length reccomend of 2.100 im 2.104 . measured the neck thickness of a fired case that was stuck it is .018 and a loaded catrige is .294 . it wouldn't suprise me if it is a barrel issue. just add it to the list of promblems i have had with the mcqgowen barrel. shilen is the one ill stick with from now on
 
I missed that you were using a 140 in your original post.
I still wouldn't use 414. As for your case length, where did you get the 2.100 suggested length from? Is it from McGowan? Did they provide you with a dummy round to set your head space? If not, what are you using to set it? If your throat ends at 2.100 and you are at 2.104, that may be enough of an issue right there. If you have set your head space a couple thou tight, then you can multiply the case length issue exponentially.

Are you full length sizing? Are you neck sizing? Where did the dies come from? There are a lot of variables here.

Believe it or not, I am trying to help. Don't get defensive. You did not say you got the load off Hogdon's site, you said "using 264 winmag loading data i figured i would try a few shots". It does not matter, because there is obviously a problem that appears quite serious (to me) using what could be considered (but may not be) safe load data.

On a side note, I do not understand your "only variation" comment. Are you saying the only other WSM (beside 270 and 300) is 7mm, or are you suggesting that 6.5WSM's are only built on 7WSM brass? On both counts that is not true; there is no SAAMI specs for 6.5WSM, so you need to get the specifics from whomever chambered it.
 
newest update:
loaded one of the stuck brass back up with imr 4350 47.8 grains 140 grain. bullet
fired little stiff removing but the ejector held onto the brass and has able to eject.
2.100 is what the case length is trimmed to.
i cleaned the barrel
using 600grit i believe i removed 3 thou off the neck
little stiff meaning it needed a whack up on the bolt which breaks the hold of cartrige on the chamber ... so it seems by the camming action.
atleast it didn't require a brass rod and boucning of the floor using the weight of the gun.
so which was it?
-powder
-neck tension
-powder charge
-or headspacing

oh ya for headspace i used a cartige i put thro the sizing die and using a piece of painters tape on the base to check for unable to close. i then reloaded the cartige i used to headspace.

total diameter of loaded cartige before firing was brought donw to .2915 after fired. it was .2965

ill try loading at 45 gr and see what happens
 
well it required less effort with lifting the bolt but it seems to get "jammed" for lack of better word. maybe its not the reloading asspect i need to be looking at and more the rifle thats with 45 gr 4350 which is i believe 3 grains ahead of my 260 load
 
There something seriously wrong with your set up. You are so far below the range where you should be having any pressure signs that I am at a loss. Without accurate dimensions of the chamber, everything is guesswork.

IMO, you should take that rifle to a qualified gunsmith and have it looked at. A chamber cast would be most useful. I would have everything checked, including the chamber, bore, bolt, throat.... everything. I would definitely stop shooting it.

I hope things work out.
 
Pudelpointer said:
There something seriously wrong with your set up. You are so far below the range where you should be having any pressure signs that I am at a loss. Without accurate dimensions of the chamber, everything is guesswork.

IMO, you should take that rifle to a qualified gunsmith and have it looked at. A chamber cast would be most useful. I would have everything checked, including the chamber, bore, bolt, throat.... everything. I would definitely stop shooting it.

I hope things work out.
Click to expand...

:agree:
 
I'm having a hard time following this, as you have three threads on the go with the same issue. IMR 4350 should be ok.

"total diameter of loaded cartige before firing was brought donw to .2915 after fired. it was .2965"

I can't follow what you are doing with neck measurements. Simple questions:

1. What is your loaded round neck diameter (before firing of course)?
2. What is your fired round neck diameter (before sizing)?
 
also forgot to include that the fired case has around 15 to 20 bright circles around the case spaced out of the length of the case. ill try lapping the chamber slighly later on
 
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