Make sure the rifle is nice and clean before you start your shooting is important. Then before you load, pop off at least three of the 209 primers. This will blow the oil and crud out of the breech plug and even put a mild fowling in the breech area of the rifle I like to run a dry patch through the rifle at this point and wipe out some of that fowling. Other leave it in.

Powerbelts should shoot real well out of the Winchester but you will not know that until the rifle is actually shot. Limit your powder to 100 grain loads. The Powerbelts will function with higher powder charges but they tend to produce the best accuracy around 100 grains.

Also remove the plastic button on the bottom of the powerbelt before loading. Put a small dad of oil or bore butter, even spit on the lead spike and then put the button back on. All to often these Powerbelts are holding on to their plastic buttons. Have the projectile shed those plastic buttons ASAP gives you better accuracy down range.

If you really like the Winchester.. and it fits your budget. Well good luck. I would encourage you to look at the Omega Keith is talking about. It is a real great rifle. There are also better rifles out there for about the same money. But then, fit and your personal satisfaction are important, so I would not tell anyone what not to buy.

Good luck with the rifle. Also loose powder is a lot cheaper then pellets. What you will spend in pellets and powerbelts, ... well you will find out fast. They are expensive...

Again, Good luck.