I have had several semi's. I love them for East Coast huntin. The 270 is the hardest to get to shoot and cycle well as I found out while trying to work up a load for. There is a small window of operation for 270 Win with like IMR4064 powder to get reliable cycling and accuracy. But Corlokts, even though I hate their accuracy, never has ever jammed.

But with all the 30-06's, from the BAR's I have had to the 7400's, I have never had a problem. 80% of all the jammers, I have seen, have been operator error. The other 15% was reloaders trying to use slow powders for velocity. And one I saw where someone bent the metal bar that works the spring. I bet 5 people have told me they had jam problems, I took the whole action apart, they had too much oil, with too much filth, or not enough oil with too much filth. So as with the any semi auto, cleanliness it next to godliness. Not too much oil but just a coating. And then wipe it out with a clean dry rag. I also take the action apart every time I shoot. Good consistent, and I stress consistent, cleaning, will cure almost all your problems. I have put over 20 deer on the table with my 7400. The one time it did jam, I didn't know how to properly clean a semi-auto, and used to think the more oil, the better and in combination with 5 degree morning, it jammed.

Also, I worked up a load with 47.0g of IMR 4064 loaded to 3.285" COL, 130g Sierra that shoots subMOA groups all day. It took however a dozen tries to find this load/COL combo to work this year.