The rifle came to me after a friend hunter (Jack Jones) mentioned he did not expect to ever get back to Africa to hunt big/dangerous game. He had taken this rifle there a few times (Along with his model 70 in 270 caliber.)
Jack said he wasn't the original owner, but had mentioned that the rifle had previous to his ownership, made trips to Africa.
I have owned the rifle for many years now and while preparing for a Wyoming elk hunt this fall, I was surprised to find that the cartridges occasionally hung up in the magazine well. I had hunted with the rifle previously, but never noticed any problems.
I would have thought that prior to at least one of the Africa trips, one of the prevous owners would have had the rifle "prepped" to assure there would be no malfunctions. Apparently not.
I found that if 3 or 4 rounds were loaded up, during bolt cycling the 3rd or 4th round would tilt, and fail to feed.
I was a bit baffeled at first. I inspected the follower and saw that it was properly polished as was the receiver base above the magazine well. The follower was good and the spring was excellent.
As I operated the bolt, inspecting cycling many times, I eventually realized that cartridges would caatch on the entrance to the hollow under the chamber ramp, between there and the wood of the stock. (Width of the bottom of the receiver and about 0.190 height) Seems that the cartridges would periodically move forward enough to catch on the edge of the hollow. Solution was to fill that hollow with epoxy, being careful not to affect seating of the action into the stock.
It took a bit of time to determine that this was my problem, since I was unaware of what different things gunsmiths do to make sure a DG rifle's action is as near foolproof as possible.

quote:

Originally posted by Bob Nisbet:

I would have thought that prior to at least one of the Africa trips, one of the prevous owners would have had the rifle "prepped" to assure there would be no malfunctions. Apparently not.

I'd bet the % of folks headed to Africa that send their rifle off to a gunsmith to be 'prepped' is actually quite small.

Mine is late 50's and I found that it was sensitive to COL. Even though the rounds still fit in the mag and will cycle at normal speed, if the rounds are longer than spec OAL and the action is cycled quickly (as in getting a second shot into a buff) it will jam.
Solution was a bit of polishing on the feed ramp and making sure COL did not exceed factory specs.

As opposed to glass in the magazine,that may chip at some point, I would suggest trimming the throat area to make it match. would only require a very small amount of metal removal, if I understand the problem, then again it might need some inletting to move the action lower into the wood or the magazine deepened to meet the action?? Would have to see it, as not sure exactly what the real problem is.