.257 Roberts AI feeding issue

[BUSTINDOGS]

Anyone have trouble getting the .257 Roberts Ackley improved to feed out of a rem 700 long action? I have my rifle that I re barreled to a 6.5-284. that I'm now going to re barrel again to the Roberts. I bent the feed lips of the mag to work for the .284 case and I'm hoping that I can just buy a new standard magazine. As I'm sitting here playing with a dummy round for the Roberts it's not feeding from my modified mag at all.
Thanks

 

[ShtrRdy]

in what ways is it not feeding?

 

[xr650rRider]

I've got a Defiance Classic long action and 257 Roberts AI feeds fine but I'm using a Wyatt's extended box and using hinged floorplate.

 

[Philward]

Bdl, adl, factory dbm? Or some other aftermarket dbm setup?

 

[Crockett12]

The 284 brass is different than .257 Roberts Ackley improved! I'm not surprised it won't feed!