I am looking into purchasing the Seekins SP10 308 18" rifle for competition use. Looking to use it just a few times a year. Shot range will be from bay type shooting out to 800 yards. I currently reload all my own ammunition for other calibers but not set up for the 308 yet. I am looking to purchase about a 1000 rounds for break in, practice and competition. I do not know the twist rate of the match grade barrel at this time as they don't advertise it. So i need a few things from this group before I pick it up.
1. Ammo recommendations for brand and bullet weight for general accuracy, economy and able to hold 1-2 MOA groups. Longest shot known now is 650 yards.
Note: I am not sponsored and I am not rich!
2. Knowledge and/or experience with the mentioned rifle
3. Best way to break in the barrel if needed or just heat it up the old fashion way?
I appreciate the responses as this is on a short time window of opportunity.