michael458
AH fanatic
The CEB #13 Solid and the current North Fork Solid were designed around the Winchester M70 Control Feed Action.
I own, shoot, and hunted with nothing but Winchester M70s from day one. I apologize somewhat for my selfishness, but when designing the #13 my main focus was the M70 Control feed, and not much else.
We know meplat size is of the most important factors in Terminal Stability of a Solid. We know that 65% meplat of caliber is the breaking point of that stability, below that, stability during terminals suffers greatly, above that, in calibers .458+ a bullet can actually self stabilize to around 90% of its total depth of penetration, with no rifle twist or engraving. 416 caliber has a bit of a tougher time at it, and actually needs a faster twist rate of 1:12 to be 100% Stable during terminals, because of actual meplat physical size.
We tested from 65% to 70% meplat for the M70s. At 70% some guns would start to have issues. Finally settling on 67% meplat for the CEB and North Fork went to 68%, giving 100% reliable feeding in all M70s I had, which entailed anything from .416, .458, .474, and .500.
I had several M70 416 Remington over the years, and never had one that suffered feeding issues with either CEB or North Fork, even straight out of the box factory, and the same with 458 Winchester and 458 Lott.
I assume that @lil 2 sleepy rifle is a control feed gun, I have not heard otherwise or missed it. Any Push feed gun will have difficulty feeding these.
Also, I am no gunsmith or expert in anyway, fact is, I probably destroy more than I fix. But I have been lucky from time to time, simply changing parts out and achieving success.
From what I am seeing above, I believe the issue will be a matter of 3 possible issues. Spring, Follower and Extractor. One comment might lead one to think that the extractor is too tight, giving a push to the cartridge before sliding up under? I tend to think it is more in the Follower than anything else, and perhaps a new spring is in order too. There is something between these three components that is not interacting properly that is causing this, in my humble opinion.
I have seen many times in my Super Short series that the spring will get too much forward in the floor plate...... This causes the cartridge to point downward, and absolutely will not feed anything at that point. In those cartridges we pinned the spring in place in the floor plate to keep it from shifting during recoil, but I have never seen that issue with 416 Remington, 458 Winchester or 458 Lott.....but anything is possible I suppose, check the position of your spring in the floor plate, very simple......
The best advice I have is a competent gunsmith, and I would discuss these three items with him, most likely a change in these will give the desired results. I doubt that any serious grinding metal is going to be required at all.
Those that have other rifles that are not Winchester Control Feed guns, and have issues, you are going to need a gunsmith to sort that out for sure and I can't be of any help at all with CZ or others............ sorry.
