Return shipping options for graded coins

When you send coins away to be graded by PCGS or other firm, which return shipping option do you select and why? USPS Priority, USPS Registered, Fedex or other?
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When you send coins away to be graded by PCGS or other firm, which return shipping option do you select and why? USPS Priority, USPS Registered, Fedex or other?
Comments
I only allow USPS registered. Only issues I have had with theft were from UPS. They did nothing to help find the coins.
Successful BST with drddm, BustDMs, Pnies20, lkeigwin, pursuitofliberty, Bullsitter, felinfoel, SPalladino
$5 Type Set https://www.pcgs.com/setregistry/u-s-coins/type-sets/half-eagle-type-set-circulation-strikes-1795-1929/album/344192
CBH Set https://www.pcgs.com/setregistry/everyman-collections/everyman-half-dollars/everyman-capped-bust-half-dollars-1807-1839/album/345572
IMO, it's best to use the default return shipping. That way, the shipment is covered by the firm's insurance. If you select an "alternate return shipping" for a PCGS return, you need your own shipping account number and YOU are responsible for insurance coverage and taking the loss risk.
Nothing is as expensive as free money.