How much deeper should I seat them? Suggested OAL is 3.210", and my current OAL is 3.405", so should I seat them to the suggested OAL or something like 3.300" instead?

Also, I'll check the action screws and clean the barrel, too.

Why load them long in the first place? Not trying to be a smart a$$ but curious if you had a thought on loading so far outside of the recommended length.

How much jump were you trying to allow at 3.405"? What's your jam length for that rifle with that bullet?

Better accuracy. I seat bullets similarly long in my 300 Win Mag and 221 Fireball Encore pistol barrels, and it noticeably improved the accuracy. The 300 shoots 1 MOA, while the 221 is capable of about .5 MOA when I do my part.

I was trying for about .02".

I start at .030" off the lands, they shoot faster at less pressure if given some jump. best group I ever shot measured .04 MOA at a lazer ranged 752 yards, was .030 off the lands. also keep runout to a minimum will help also, the straighter you start your bullet into the lands the quicker it stabilizes.
RR

Why would his seating depth be different? Did he take his dies apart and set them again?

I though powder charge was different. If its the same, I say human error. Possibly the way he is grabbing trigger. This is more prevelent in hand guns, for me though.

As said closer to the land is often more accurat.


One of my theories as as way some cheap guns are accurat is the lands are very close. My old 700 very far away. Savage, close.

Having them close may restrict the amount of powder you can add, if you want to go beyong published data. Obviouly may make the rifle a single shot too.


I am not sure it will account for lateral movement. Maybe others have seen it.

As I said, since they are grouping, just a different spot, I say human factor. Maybe someone has seen different.

Some long range shooter vary the depth before working on loads. I vary loads and bullet first, but I am not a long range shooter, or a pro.

wrong! why not just stick with what you know.
RR