Detachable Box Magazine bottom metal...
I'm using a DBM from a company called ATLASWORXS from Australia. They had a group buy on SnipersHide for $80US for complete bottom metal.
Works with all AI magazines. Shown here is the newer plastic AI 223 mag from Brownells ($39) that are actually reasonably priced.
Man, does it feed SO MUCH BETTER than the stock internal magazine. The magazine feed lips are dead center, it does not feed left then right like the stock internal magazine.
So smooth, it's unreal. The bullet position in the magazine is not critical either. I have tested with it all the way back and forward and in between. The bolt picks it up perfectly even though the round is so short.
Of course, I still need to hit the range and test, but cycling dummy rounds has been 100%.
It took a lot of work to get it into the stock. Lots of dremel, filing, sanding, and trial and error.
Next up is bedding the action, stiffening the stock (with some used carbon fiber crossbow bolts), etc.
You might ask, why put so much work into a crappy stock like the SPS standard stock? Cause it's fun and if I screw up it doesn't matter.
Latest 300BLK Remington 700 mod...
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- chrismartin
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Re: Latest 300BLK Remington 700 mod...
Did you convert a Remington 700 to 300 BLK or is this a Micro 7?
I have been thinking alot about rebarrelling a Rem 700 with .223 bolt face to 300 BLK. I was wondering if there any quirks I should be aware of?
I have been thinking alot about rebarrelling a Rem 700 with .223 bolt face to 300 BLK. I was wondering if there any quirks I should be aware of?
- chrismartin
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Re: Latest 300BLK Remington 700 mod...
It is a Remington 700. The short action 223 receivers has issues with ejection. You'll need to modify the ejector a bit to get ok ejection when using a case as short as the 300BLK. There are better actions out there for this round, but the 700 has a ton of stuff you can do with it.TMH260 wrote:Did you convert a Remington 700 to 300 BLK or is this a Micro 7?
I have been thinking alot about rebarrelling a Rem 700 with .223 bolt face to 300 BLK. I was wondering if there any quirks I should be aware of?
Re: Latest 300BLK Remington 700 mod...
I know my gun case is set up around 700's so that is the reason for my choice. Would a .221 fireball ejector fix this issue?
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Re: Latest 300BLK Remington 700 mod...
There is only one ejector. A single part number, there is no difference. This has been confirmed by calling Remington. You can modify the ejector to allow it to function a bit better, but if you work the bolt slow, it will still tend to drop the case early. All you have to do is lengthen the slot so that the end of the ejector is flush or almost flush with the end of the bolt. That will help push the case against the receiver with more force and hold it a bit tighter. Still not perfect though.
Re: Latest 300BLK Remington 700 mod...
Thanks for the info. I had thought about going with a Savage but just have so much 700 stuff on hand. Well I will mull it over through Christmas and keep my eyes peeled for a good deal on a used .223 bolt faced donor rifle (Savage or 700 whichever is the best deal).
Re: Latest 300BLK Remington 700 mod...
chrismartin wrote:There is only one ejector. A single part number, there is no difference. This has been confirmed by calling Remington. You can modify the ejector to allow it to function a bit better, but if you work the bolt slow, it will still tend to drop the case early. All you have to do is lengthen the slot so that the end of the ejector is flush or almost flush with the end of the bolt. That will help push the case against the receiver with more force and hold it a bit tighter. Still not perfect though.
Well, there clearly is a difference between a .223 Rem bolt and a .17/.221 FB bolt, and it does lie in the ejector. The extractors are definitely the same.
I built my 700 up on a .17 FB SPS Varmint and it ejects the cases absolutely perfectly and there's no problem at all. I accicidently picked up my .223 ADL's bolt and used it in my 300 Blackout 700. Ejection was definitely an issue and the problems with the cases falling off and landing on the magazine follower were evident. If it managed to eject after working the bolt rearwrds in a brisk manner, ejection was very weak with the brass just clearing the rifle.
The pic on the left is the bolt from my .17 FB based rifle. The other is from my 70 LTR in .223 Rem.
Last edited by 2bad4u2 on Fri Dec 09, 2011 6:21 pm, edited 1 time in total.
- chrismartin
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Re: Latest 300BLK Remington 700 mod...
All I can tell you is that the part numbers are the same for all ejectors except the SAUM (From Remingtons parts list _AND_ brownells)2bad4u2 wrote: Well, there clearly is a difference between a .223 Rem bolt and a .17/.221 FB bolt, and it does lie in the ejector. The extractors are definitely the same.
This was confirmed by Remington and they also stated that the 17FB ejector was the same as the 223 with no modifications noted in their system (no fitting instructions that would change the two)
http://nfatalk.org/forum/showthread.php ... ht=ejector
I have purchased several ejectors and the radius on the edge does vary a bit, but none as much as your 17 (that I have seen)
I made my ejector look more like yours.
You have your bolts reversed. The bolt with the cut in the lugs is the 17FB (From the file names you linked to).The pic on the right is the bolt from my .17 FB based rifle. The other is from my 70 LTR in .223 Rem.
Re: Latest 300BLK Remington 700 mod...
Thanks for pointing out my error in description. I corrected my post.
Chris,
If you're correct in what you're saying then there seems to be more confusion than ever over this ejection situation. If the extractors and ejectors ARE identical between the .17/.221 FB and .223 Rem. rifles, then why the ejection difficulties at all?
From all reports, and confirmed from my own experience and not something I've read/heard on the internet, there is a distinct difference in function between them. Then WHAT is the real issue and WHY is it happening?
Chris,
If you're correct in what you're saying then there seems to be more confusion than ever over this ejection situation. If the extractors and ejectors ARE identical between the .17/.221 FB and .223 Rem. rifles, then why the ejection difficulties at all?
From all reports, and confirmed from my own experience and not something I've read/heard on the internet, there is a distinct difference in function between them. Then WHAT is the real issue and WHY is it happening?
- chrismartin
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Re: Latest 300BLK Remington 700 mod...
Yup, that's the $20K question. Can you pull the ejectors on both then compare and measure them?2bad4u2 wrote:Thanks for pointing out my error in description. I corrected my post.
Chris,
If you're correct in what you're saying then there seems to be more confusion than ever over this ejection situation. If the extractors and ejectors ARE identical between the .17/.221 FB and .223 Rem. rifles, then why the ejection difficulties at all?
From all reports, and confirmed from my own experience and not something I've read/heard on the internet, there is a distinct difference in function between them. Then WHAT is the real issue and WHY is it happening?
I wish I had a 17FB, I'd do it myself.
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