Re: Long range with a sporter barrel ?
I usually start near the lands .005" or so. I don't in general like to seat into the lands for a variety of reasons. When I've gone closer than .005", I've found an occasional bullet that will get to the lands and cause a spike, could be a slight malformed bullet ?? I've also seen bullets pull out of the cartridge upon extracting a loaded round, dumping the powder into the action. Many will say that as long as you have enough neck tension, it won't happen; however all it takes is one split neck and you have a mess.
I like to stay close to the lands, in order to give me all the powder capacity I can get. If you can get good velocity/accuracy close to the lands, there is no reason to seat them deeper (unless you have a short magazine).
The above is what works for my rifles, your mileage may certainly vary.
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