Nice piece of lumber!!! I've got nine 527's and that one is better than any one that I have except the Ebony which is a different class altogether. I've put BC stocks on two of mine so far, I've got a third waiting to be bedded onto the rifle. The Varmints don't come with rings, the Americans do. I can't remember if my FS did or not. I'm not a fan of their rings, slotted screws in this day and age, seriously. I put DIP rails on everything so I can swap glass back and forth. My 527 American Grendel isn't the greatest shooter, I'm probably going to cut it back to 20" to stiffen the tube up a bit since I'm happy with the performance I get out of my 20" gas gun.
These are what I have so far:
MTR 6.5 Grendel pillar bedded
American 6.5 Grendel pillar bedded into Boyds classic LH cheek
Varmint .204 Ruger BC stock bedded
Varmint .17 HH BC stock bedded
Varmint .222 Rem BC stock to be installed
Full Stock .223
Ebony .223
LH American .223 in a Boyds PV with a .985" straight 1-8 stainless match barrel
American .221 Fireball
Taz575 Wrote:Is it when feeding from the mags? I find the mag lips on the inside are rough and smoothing them out helps feed smoother. I did this with my 223 and 6.5 Grendel 527's, plus the mag spring wearing in helps, too. Or is it without the mag? Sounds like there is a burr or something somewhere possibly?
Hey Taz, never thought to check this one out. Will give it a try. thanks for the thought.
Feeds like butter smooth now. And I'm in love with this trigger. Got the normal function set for min creep and over travel and set the pull to where I like it.
The set trigger function is set around 10 onces for target work.
12-11-2019, 10:41 AM (This post was last modified: 12-11-2019, 10:52 AM by Bert2368.)
Raf Wrote:Nice smart assed remark!!! This is the second 527 I bought with the same problem. the gun is great with this one exception!!!
Someone else must be having this problem. ANYBODY????
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I see I should have read the whole thread before replying...
(End)
I have 4 CZ 527 rifles. The "rough bolt" problem is fairly common. My 7.62x39 had just a touch of it which smoothed out after a couple of hundred rounds. My .223 American (the version with a plastic stock & 3 round flush magazine) has it quite badly, it is slowly improving with use.
The problem with this seems to be rough machining in the bolt way. Some have put JB bore paste on their bolts and spent an evening working the bolt a few hundreds or thousands of times. Some have (CAREFULLY) worked on smoothing out the rough machineing with other methods.
My old .22 Hornet "Lux" was very well used and smooth when I got it. My .221 Fireball bough used also had a lot of rounds through it and was nice & smooth.
You CAN just shoot it a lot... It will probably wear in.
Bumping this back. I need all the cz grendel owners to check their mags with long vld style bullets. Tipped or hpbt doesn't matter.
Something I noticed at the range today. All the mags (4) would feed the round butter smooth.
BUT each and every mag did the same thing. Strip the first round,fire,eject and the stoppage.
The next round coming off the mag would stop because a round down in the mag would slid forward and the bullet tip would be in the cut out on the front of the mag.
None of my mags did this or had this problem with the 120 gold dot or the 85 trex bullet. Just the longer sleeker 129 ablr, 123 hpbt bullets I fired today.
So could a few of you gents check your mags with bullets like I stated above and see if yours does the same thing.
kmon Wrote:Longest I have run in my 527 Grendel were with 130gr Berger AR Hybrid at 2.285 and they ran fine from it.
The 129gr LRAB I am running with CFE 223 and 2.27 IIRC and 30.6gr CFE 223 Standard not mag primers.
I don't think it's the length of the rounds that's the problem, seems like the mags have a bit to much play in the spring and when the rifle recoils it lets the rounds slid forward.
I shot my Cz 527 American a couple days ago and the floor plate jarred loose on my Supplied mag. I made sure the floor plate locking tab was seated in the hole of the floor plate and it never came loose again. I had no malfunctions in my two mags. I fired factory 123 Black ELD-M, reloads with 123 grain A-Max, 100 grain TTSX and 90 grain TNT, all functioned fine. I’m the weak link in the performance of this rifle but I still need to tweak the take up on the trigger and check the stock to ensure the barrel isn’t in contact with the stock after it heats up.
VASCAR2 Wrote:I shot my Cz 527 American a couple days ago and the floor plate jarred loose on my Supplied mag. I made sure the floor plate locking tab was seated in the hole of the floor plate and it never came loose again. I had no malfunctions in my two mags. I fired factory 123 Black ELD-M, reloads with 123 grain A-Max, 100 grain TTSX and 90 grain TNT, all functioned fine. I’m the weak link in the performance of this rifle but I still need to tweak the take up on the trigger and check the stock to ensure the barrel isn’t in contact with the stock after it heats up.
Same here. Pound for pound this cz is the most consistent accurate out of the box rifle I have ever owned.
I have mine in a bell and carlson stock and I noticed the mags have a lil front to back play in the bottom metal.
May try the old duck tape trick and see if tighting up the fitment stops what's happening.
When it happens a bullet tip gets in that lil cut out and it stops the mag feed cold. Can't even get the top round to strip off. It jams the mag up.
Other then that issue it feeds great. Not as smooth as the howa mind you but smooth enough to get fast follow up shots if need be.
Strange thing is it only happens when I lock the mag in with 5 rounds. If I put a mag with 4 rounds in it, the problem doesn't happen.
I noticed the 6.5 Grendel/7.62x39 mag is a little hard to load because the feed lips end at the shoulder of the case. I wonder with five rounds in the mag the bullet nose tends to push downwards when the bolt head starts pushing the cartridge forward. Any slop in the mag body fitment might aggravate this issue. There seems to be enough case taper for the top round to have more tendency for the bullet nose to push down over being pushed up or straight ahead. This issue is similar with AR-15 mag feed lips that don’t release the cartridge to start rising and the edge of the cartridge case mouth snags on the front of the mag body. To remedy this situation you can change the feed lips a little to let the cartridge have more room to raise or lower the front edge of the mag body.
VASCAR2 Wrote:I noticed the 6.5 Grendel/7.62x39 mag is a little hard to load because the feed lips end at the shoulder of the case. I wonder with five rounds in the mag the bullet nose tends to push downwards when the bolt head starts pushing the cartridge forward. Any slop in the mag body fitment might aggravate this issue. There seems to be enough case taper for the top round to have more tendency for the bullet nose to push down over being pushed up or straight ahead. This issue is similar with AR-15 mag feed lips that don’t release the cartridge to start rising and the edge of the cartridge case mouth snags on the front of the mag body. To remedy this situation you can change the feed lips a little to let the cartridge have more room to raise or lower the front edge of the mag body.
I'm not sure it's that either. Because when I put 5 in the mag the top round is pointing at a good angle upwards. I think it's a case of mag slop fitment and the spring they used.
A5BLASTER Wrote:I'm not sure it's that either. Because when I put 5 in the mag the top round is pointing at a good angle upwards. I think it's a case of mag slop fitment and the spring they used.
If you had the rifle magazine disassemble itself and spring came out? Try putting it back together with the magazine spring REVERSED. The spring may not be symmetrical in CZ mags, I had a feed problem after the first time I disassembled a magazine to clean it until I re did it other way 'round and everything worked fine again.
On my 7.62x39 CZ, I also had to lightly tweak the feed lips before it fed anything but steel case FMJ from a full magazine reliably, longer/less pointy bullets were jamming into back of barrel instead of feeding.
Raf Wrote:So I love my CZ 527 and only have one BUT!!! Can't CZ make a smoother bolt action? Getting tired of having to push the bolt back into battery from the rear and being able to use the bolt handle. The bolt is far from smooth and constantly sticks when operating the bolt. Am I the only one having this problem?
I have 3 CZ rifles. One a big 550 Safari American , two of the 527's. My first 527 is a .22hornet supposed to be a fancier model, but wood is rather plain dark walnut, but the bolt is jeweled. The last a 527 American in 6.5 Grendel. Bolts on all were sticky. I took some small hard Arkansas or ceramic files and broke the sharp edges on the back of the lugs and anywere an edge could be a scraping edge as it cycles back through the action. I then coated it with some flitz and cycled and cycled , probably close to a couple of hours each. This did wonders in smoothing the action. As I see things the problem is the lack on an antibinding lug. My old Winchester M70 and my Swedish mausers have such a lug, 1/3-1/2 of the way back on the bolt body, and designed so it contacts the bottom of the left lug race, so that you cannot try to rotate the bolt too far, nor jam it to the left side as easily so as to cause binding. I suspect the lack of such a feature is simply a cost cutting measure eliminating some machining steps.
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