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Old 07-14-2017, 12:11 PM   #1
corps2010
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Default Bolt hard to close on Rem 700?

I bought a box of 165 grain partitions for my Sendero .300 RUM and when trying to chamber a round, the bolt is extremely difficult/tight to close. HSM ammo feeds just fine. Any ideas what could be going on?
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Old 07-14-2017, 12:14 PM   #2
bwssr
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factory rounds or reloads?
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Old 07-14-2017, 12:16 PM   #3
Charrison
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I had this happen with some custom ammo for a .280. Turns out the neck of the cartridge was just a little too big and that was my problem. Believe it was a Nosler round- switched to ballistic tips, same weight, and bolt worked just fine.
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Old 07-14-2017, 12:27 PM   #4
Outbreaker
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If it is brass that has never been fired from your rifle (even new) the headspacing can be off a little and cause a bolt to close hard.

I shoot the .300 RUM and have seen it more than once. This is a big reason I reload for it.
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Old 07-14-2017, 12:28 PM   #5
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Its in the casing, doing reloading for awhile, I have run across this w/ reloading, and some guns are tight chambering too...
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Old 07-14-2017, 12:54 PM   #6
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More than likely it's the case was improperly resized? Usually shoulder is not set back far enough, or the roll crimp is improperly set up causing a slight bulge at the neck shoulder junction

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Old 07-14-2017, 01:12 PM   #7
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[quote=Outbreaker;12573522]If it is brass that has never been fired from your rifle (even new) the headspacing can be off a little and cause a bolt to close hard.



X2
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Old 07-14-2017, 04:29 PM   #8
Maxlab
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Very common for problem for a Remington 700. You just need to polish the chamber and you will be good to go. Does not cost much.
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Old 07-14-2017, 04:30 PM   #9
emanon6
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I'm sure you know your gun well, but in my 7mm rem mag., the bolt is hard to close if I put the bullet straight into the chamber as apposed to loading into the magazine first. Probably not your issue, but something I had to figure out.


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Old 07-14-2017, 04:49 PM   #10
Outbreaker
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Quote:
Originally Posted by emanon6 View Post
I'm sure you know your gun well, but in my 7mm rem mag., the bolt is hard to close if I put the bullet straight into the chamber as apposed to loading into the magazine first. Probably not your issue, but something I had to figure out.


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I bet yours is a control feed not a push feed like the 700.

My 1917 enfield is that was as are other actions that are based on the Mauser control feed (mod 70 etc)
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Old 07-14-2017, 04:52 PM   #11
GarGuy
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Do the hard to close loads group better? If its a head space issue,, the load very well may shoot tighter. Could be a seating debth issue as well. look for excess pressure signs on the hull.
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Old 07-15-2017, 02:04 PM   #12
corps2010
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These are factory loads. And i appreciate the feedback. I may get the chamber polished and see if I can find somebody to handload some rounds for me. And as far as accuracy goes, the HSM rounds actually shot a little better than the partitions did just from the little I've shot the partitions. I just wanted to make sure they were safe to shoot since I hadn't experienced an issue like that before.
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Old 07-15-2017, 02:17 PM   #13
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Quote:
Originally Posted by GarGuy View Post
Could be a seating debth issue as well.
This is probably the most likely cause. You would think factory ammo would be SAAMI spec but you never know.
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Old 07-15-2017, 02:56 PM   #14
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Load a round, close the bolt, and then extract it and look for rifling marks on the bullet---which would indicate the cartridge's OAL is too long and bullet is being jammed into the rifling. Don't think it is likely with factory ammo though--
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Old 07-15-2017, 03:21 PM   #15
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Quote:
Originally Posted by dustoffer View Post
Load a round, close the bolt, and then extract it and look for rifling marks on the bullet---which would indicate the cartridge's OAL is too long and bullet is being jammed into the rifling. Don't think it is likely with factory ammo though--
You might also takes a magic marker and color everything on the front end, chamber a round and see if any of it is scratched off and where.
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Old 07-15-2017, 06:44 PM   #16
Outbreaker
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Quote:
Originally Posted by M16 View Post
This is probably the most likely cause. You would think factory ammo would be SAAMI spec but you never know.
I have only seen 1 Model 700 that could reach the lands at magazine depth......and never in a magnum cartridge.
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Old 07-15-2017, 06:56 PM   #17
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Quote:
Originally Posted by Outbreaker View Post
I have only seen 1 Model 700 that could reach the lands at magazine depth......and never in a magnum cartridge.


On newer 700's, both of my older 700's will get to the lands at mag length and one of them is 7 mag
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Old 07-15-2017, 08:47 PM   #18
Outbreaker
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Quote:
Originally Posted by bboswell View Post
On newer 700's, both of my older 700's will get to the lands at mag length and one of them is 7 mag
The one I saw it on was a long action from the 1970s.

His is a .300 RUM and they will never reach the lands at magazine length.
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