Pie doughs are sensitive. Try not to pull or tug the dough when fitting it in the pan—it can cause it to shrink when baking.
Stick to Shortening
Perfect pie crust? Crisco® All-Vegetable Shortening is a must. Its high melting point creates tender, flaky layers in the crust as it bakes.
Peek On Your Pie
About halfway through baking, check on the pie—you might need to cover it with foil to prevent over-browning.