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I am curious as to why they didn't install this at the factory, and am hesitant to do anything until I find out a bit more about it (I don't want to install it if I don't have to and it could actually make accuracy worse potentially?). I have heard that originally these rifles didn't have the stock cross bolts but that they were fitted after some stocks started cracking but are otherwise just installed as a precaution on the 375H&H. The stocks that were cracking were on 458Win Mag and 416Rigby, none on the 375. Maybe the steel insert is only installed on the 458 and 416 at the factory and included as an optional extra on the 375 (if the stock starts cracking?).

My 602 never had the stock reinforcement cross-bolts and I hadn't heard of any stock issues at that time.

Well almost better - still seems to stringing high to low as the barrel heats up, I guess I'm going to have to bed it now. I didn't try to loosen the front screw under the rear sight but this still may be warranted further down the track. It shows potential (groups at 100 yards):

http://images.yuku.com/im...d530991dfa3e779b5da43.jpg

In order of firing the top left shot is the first, the next three is the cluster and the fifth is the bottom right - overall group is just over 2 MOA and the cluster is just under 1/2 MOA. The patched 4 shot group is 1 and 3/4 MOA.

Well I've been able to get further info from other sources in the meantime (guy at the range, guy at a gunshop and the CZ Forum).

Apparantly bedding will fix the problem since it is likely that there is poor contact between the action recoil lug and the stock in this area. Everyone is saying this is the likely problem. It also appears that the additional recoil lug under the rear sight base is preventing the action recoil lug from contacting the stock since it is making contact at that point 'first' - the guy at the gunshop said the stock on his CZ 450 Lott cracked at the forward recoil lug (under the rear sight), and this seems to agree with this deduction.

So, I'll do a 'normal' bedding job and leave the rear sight lug alone. (I did try various levels of tightness on the rear sight base screw at the range last weekend but it didn't make a difference - makes sense since the lug and block contact faces are square and the tension on this screw wouldn't alter alignment to change the poor contact at the action recoil lug.)

jkingrph, what year is marked on your action? I thought all new CZ Safari Classics had the cross-bolts (even if the 375 didn't really need them).

Must've been adding the cross bolts just after then - I thought they had been doing in for a couple of years now (sounds about right).

My story (saga?) continues...

I found that the action recoil lug was 0.01" shy of contact with the stock, so I bedded it with Acraglass (and just behind the rear of the action). I also put some in under the rear sight base so I could get rid of the shim that I was using. I only used enough and I used the release agent on the external metalwork, grease in the screw threads and modelling clay in the dovetail of the underside of the rear sight base (the screw stud slides in the base 'rails'). The clay was to stop keying of the epoxy into the metal.

10 hours later, when I went to pull the metalwork out the stock it was well and truely stuck. I had to use an impact driver to unscrew the front action screw - it came out but the rest of the metalwork didn't. The head of the screw cracked too - I chasing down another one from the distributers, but the damaged one still works. There was only the slightest amount of epoxy on a couple of threads - man, that stuff is evil.

I sprayed some WD40 around the timber where the Acraglass was, to maybe help break the bond. It was 2 weeks before I got to fire it but it must've come free after the first 5 shots - the first two shots were high (4" above the last POI) so I adjusted the scope down and put 3 shots in under an inch @ 100 yards. I fired three more groups of 5 and it was like double grouping with the overall group 3 to 3 1/2 inches (in one group, 3 shots went into 1/2"!!!). It looks like I've got too much epoxy under the rear sight base and it is pushing the barrel up, but that's okay - I can file that down, and that was my intention from the start. So now I'll file that down so there's no pressure there and I may shim the 'L' lug to see what affect that has (shim it back towards the rear sight lug - I bedded it to get clearance there), and try different tension on the rear sight base screw (most tell me that it should not be tight).

I don't want to bed the 'L' lug with Acraglass because I know I'll never get it out again and I may not get it right first time - I'll see what I can do with shims.

I know these things can shoot but I'm gonna have to experiment a bit. It would be good if H&S made a stock for it.

I hadn't heard of the spray on release agent before, but I'll have a look for it. You'll have to let us know how yours shoots. I'd be keen to see the effect of bedding the L block. How did it shoot before the bedding was done?