hey guys just wonder if i can get a little help here. i just loaded up some 300 win mag for my sako l691 and my remington 700 sendero. i am using the same load in both rifles, 70.5 grains of h4831, 200 grain accubond seated at 3.400. they camber fine in my sako 300 win mag but in the sendro the bolt is hard to close when chambering a round. there is no rifleing marks on the bullet but did notice a shined up spot on the bottom of the shoulder. what could cause this? i am pretty new to reloading. any help would be great. thanks.