I reloaded my first batch of 300 ultras and dicovered that they dont close easily in the chamber, it would be almost impossible to hunt with these and requires two hands to open the bolt. I find marks on the shoulder from somthing. I dont know what the problem is. I have 50 brass that were shot and resized, they also wont close in the chamber. So I pulled the bullet from a factory load, then resized it, this one fit! The bolt closed regularly. I did use a spray lube instead of the paste kind I used for the other 50 that do not fit. So is it the lube or the fact that I fired the cases? How can I make the 50 brass that wont fit, fit?