So the results - here we have a Savage, a OEM Annie and a Promark (crappy, supposedly for a Winchester - the 69, M52 etc but didn't even fit in the mag well of my M52). They all now fit and feed in my Annie.
The secret to this sort of job is seeing where the cartridge nose will end up as it feeds. If you look at the picture carefully you can see that there are variations in the way the cartridge sits, but each one has the nose at the right height as it travels those first 5 or so vital mm's.
Its tempting to go after the magazine lips but this should be an absolute last resort. Neither of the two donors needed the lips adjusted
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