Hard bolt lift
- Thread starter GREGORYA
- Start date
I was gonna ask for more info too....
My suggestions: back off two grains & work back up .3 grains at a time; measure the base diameter on new brass, then compare that to your sized brass before and after firing again.
Sounds like your chamber might be tighter than your sizing die will comfortably work your brass back to, if you're not shooting brand new cases.
Your 130's are bare? You're not seating them well into the lands? Temps not considerably higher than you're used to with similar loads? New batch of H4350? Lot's of things to look at, then eliminate one at a time....
My suggestions: back off two grains & work back up .3 grains at a time; measure the base diameter on new brass, then compare that to your sized brass before and after firing again.
Sounds like your chamber might be tighter than your sizing die will comfortably work your brass back to, if you're not shooting brand new cases.
Your 130's are bare? You're not seating them well into the lands? Temps not considerably higher than you're used to with similar loads? New batch of H4350? Lot's of things to look at, then eliminate one at a time....
Factory or custom rifle? How many rounds thru the barrel?
Did you work up to this load or just start from here after looking at suggested loads?
Hogdon's reloading data doesn't include 6.5x47 but for 6.5 Creedmore & 140 grain bullets 40.0 grains is a compressed, maximum load.
I think you're just a little beyond the edge of what should be your max load with that rig. Take a look at this bulletin entry for some background:
http://www.6mmbr.com/gunweek072.html
Did you work up to this load or just start from here after looking at suggested loads?
Hogdon's reloading data doesn't include 6.5x47 but for 6.5 Creedmore & 140 grain bullets 40.0 grains is a compressed, maximum load.
I think you're just a little beyond the edge of what should be your max load with that rig. Take a look at this bulletin entry for some background:
http://www.6mmbr.com/gunweek072.html
A word of caution. NEVER EVER use a load that anyone tells you works. It works in their rifle and yours is going to be different.
Always take that load and back off several grains and work up. You have no idea what the chamber specs are of the other rifle, the bullet seating depth, type of brass, primer, etc.
Always remember that each rifle is an individual and there are many on the internet who will pass along hearsay info, or are not careful reloaders.
Error on the side of caution. The other fellow has nothing to loose giving you that info, you have everything to loose using it on blind faith.
Let me just get off my soap box now. Only thinking of you having safe fun and success with your rifle.
Bob
Always take that load and back off several grains and work up. You have no idea what the chamber specs are of the other rifle, the bullet seating depth, type of brass, primer, etc.
Always remember that each rifle is an individual and there are many on the internet who will pass along hearsay info, or are not careful reloaders.
Error on the side of caution. The other fellow has nothing to loose giving you that info, you have everything to loose using it on blind faith.
Let me just get off my soap box now. Only thinking of you having safe fun and success with your rifle.
Bob
I TOTALLY SECOND WHAT BOB HAS TO SAY!!! USE THE OTHER GUYS LOAD AS A GUIDE!!!!
FWIW - i've never loaded for a 6.5x47, but i do shoot a 6.5x08 with 140 bergers, 42.2 gr of h4350, vel 2940 fps and a real 'snapper' with 43.3 of h4350-no vel but suspect it well over 3000.
now the rub is i shoot a big, heavy, 4 lug action that wouldn't hicup with a 25mm bushmaster. a rem 700 is a different story when playing around the 'upper limits'.
as bob mentioned, go down by .3 gr, than .6,.9,etc.
i would not go up, my guess your at the upper limits. [i also question the mag. primers.]
another word of caution, we speak to vel. as 29 this 30 that, but never address barrel length. most of us use 30,31,32" barrels and they are going to give higher vel than a 24/26". folks will say 10fps per inch is what you gain with the longer bbl, but in my exp. it can well be greater. so again, be careful in trying to achieve someone else's vel.
you must be congratulated on going on line rather than doing more dangerous 'tinkering'. loading is not a 'black art' but there are 'caution signs' along the road and you MOST know them.
one last thing, speed is not everything, shooting is EVERYTHING. SPEED FREAKS don't always win and 'burn bbl's faster than most'
best of luck ;D
habu
FWIW - i've never loaded for a 6.5x47, but i do shoot a 6.5x08 with 140 bergers, 42.2 gr of h4350, vel 2940 fps and a real 'snapper' with 43.3 of h4350-no vel but suspect it well over 3000.
now the rub is i shoot a big, heavy, 4 lug action that wouldn't hicup with a 25mm bushmaster. a rem 700 is a different story when playing around the 'upper limits'.
as bob mentioned, go down by .3 gr, than .6,.9,etc.
i would not go up, my guess your at the upper limits. [i also question the mag. primers.]
another word of caution, we speak to vel. as 29 this 30 that, but never address barrel length. most of us use 30,31,32" barrels and they are going to give higher vel than a 24/26". folks will say 10fps per inch is what you gain with the longer bbl, but in my exp. it can well be greater. so again, be careful in trying to achieve someone else's vel.
you must be congratulated on going on line rather than doing more dangerous 'tinkering'. loading is not a 'black art' but there are 'caution signs' along the road and you MOST know them.
one last thing, speed is not everything, shooting is EVERYTHING. SPEED FREAKS don't always win and 'burn bbl's faster than most'
best of luck ;D
habu
Please take the advice given to you about not using someone else's load data, especially when you have no previous history on how the rifle handles pressure. This could have ended much worse for you than just a hard bolt lift. People have had catastrophic failures from using load data not proven in their rifle, I don't ever want to hear of it happening to a fellow forum member or that anyone here has been hurt badly from a situation like that. Yes, it is unlikely, but it's still very possible when using a new rifle with unproven load data that is at or over maximum.
Just please be careful. I don't want to see anyone's name on the daily bulletin stating you had an accident and are in the hospital. This goes for all my fellow forum members.
Everybody needs to use safety first and err on the side of caution. That way we all get to shoot another day.
Kenny
Just please be careful. I don't want to see anyone's name on the daily bulletin stating you had an accident and are in the hospital. This goes for all my fellow forum members.
Everybody needs to use safety first and err on the side of caution. That way we all get to shoot another day.
Kenny
One other note,do you have enough neck clearance? That can mimic overpowered loads as it cant release the bullet and building extreme pressure's into the danger zone and has caused catastrophic failure in many rifles ,stock remmys to custom actions. Just a thought to rehash in your mind.
I third what Bob says. 
If you are using new brass, it slips in easy, and you have hard bolt lift after the shot: you need to lower your charge until it the problem goes away.
If you are using new brass, it slips in easy, and you have hard bolt lift after the shot: you need to lower your charge until it the problem goes away.GREGORYA said:
*** If the action bolt is clicking or popping at the top of the bolt lift, it indicates that the brass is too big near the base [the web]. Throw the brass in the garbage. ***
*** If the bolt closes and opens hard throughout the whole stroke “without the pop at the top,” the shoulder needs to be pushed back. ***
Source: Jim Carstensen. Jim is the owner and lead engineer for JLC Precision, in Bellevue, Iowa. With over a decade of precision machining experience, he specializes in crafting custom dies and die conversions. JLC Precision also performs expert gunsmithing on both benchrest and varmint rifles.
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