RE: What ammo to try in my new A Bolt 270?
Are you prepared to spend a day at the range?? What shoots well in my rifle may not shoot worth a darn in your's. It's going to take some time and experimentation.
Go someplace where ammo is inexpensive or at least as cheap as you can find. Get one box of 5 different Brands and bullet weights. Start with one box, and shoot it for groups. If your first box is shooting under 1" groups at 100 yards, stop right there. Take the other unopened boxes of ammo back and trade them for several boxes of the kind that shot well. Check lot numbers (usually inside one of the flaps) and get the same lot number as what shot so well. Then be happy.
I'd start with one box of each of the following;
Remington Core-Lokt 130 grain
Remington Core-Lokt 150 grain
Federal Premium Ballistic Tip 130 grain
Federal Premium Ballistic Tip 150 grain
Hornady 130 grain SST
Hornady 150 grain SST
Winchester PowerPoint 130 grain
Winchester PowerPoint 150 grain
Winchester Ballistic Silvertip 130 grain
Winchester Ballistic Silvertip 150 grain
I would clean in between each 3 shot group, just so each type of ammo starts out the same as the last and all this shooting is actually breaking in your barrel. Make sure each shot you take is your best shot. Resist the urge to change brands if that particular brand/weight combo doesn't shoot well in the first 3 shots. Continue to shoot it until you get your 3 best shots off in a row. Try to use targets that have multiple aiming points and shoot each 3 shot group at a different one. When you switch ammo, switch to a new target and label each target with what load you're using on it. If they still won't group, clean the gun and go to the next type. Be sure to let your barrel cool often. At least every 3rd round. Even if you don't find your "best load" until the very last box, don't fret. You'll have plenty of ammo left over to use for plinking, varmint shooting, "breaking in the barrel" if you feel the need to do so, etc. Save the "good" stuff for hunting and pre-season practice.
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Oklahoma Hunter Education Instructor