My Sendero 300WM shoots .5MOA on average, I've shot it to 860 yds. Of course this is with handloads optimized for the gun, you shouldn't judge any gun by what it does with factory ammo. I've taken game to 683 yds (elk), it's an outstanding rifle. The only work I've done on it is to self-adjust the trigger.

If the A-bolt is heavier, I would opt for lighter if you are going to be hiking any distance with the gun. The Sendero is already plenty heavy.

If you check out the places long range hunters frequent, you will find that the Sendero has a loyal following as an excellent option for those not wishing to spend the coin on a custom gun.

Work up 200gr bullets or at least 180gr, you won't be disappointed.