two months ago, i got a NIB 35whelen from a local gunshop and when i sighted it in i had that same issue, the remington 200 gr. box i bought had 4 no-fires out of 20. i have yet to fix this problem, but i think its the brass, if it was the rifle, alot more then 4 would fail to fire, no ? .. my neigbhor reloads and he put gauges to my empty cases and looked in a reloading book and said" the brass is junk"..lol..
it seems to be the brass, so short of reloading my own ( thanks to my neigbhor ) i'll look elsewhere for factory rounds ..
cheers, glenn