Hello everyone this is my first post on this forum. I have read many threads and beat my head against the wall trying to decide what cartridge to go with for my long range rifle build. For this rifle I am going to be using it to shoot in some long range matches. I have already purchased a 7mm 29" Krieger blank (1 in 9 twist) because the gunsmith down the road had it but I am not restricting mysef to this caliber. I can always sell it if something else comes along. Here is what I am thinking for cartridges. 7mm-08 7mm Rem Mag 7mm-300 Win Mag 6.5 Creedmoor .260 Remington For an action I am going to go with a Defiance Deviant. And a Jewell Trigger. I guess my main issue is I am looking for a cartridge that is available to be found or easily made (7mm-300). Just would like some opinions on the topic or any other cartridge ideas you guys may have ! Thanks !