Yes, that is a good idea.

From the linked publication:

Pinching the primocanes (removing the growing tip) in July to stimulate growth of laterals will also delay fruiting. This is sometimes done to delay harvest until after the intense heat of July.

I think I'll try this. Thanks for bringing it up...

Here is a link that might be useful: Cornell Cooperative Extension: Pruning Raspberries & Blackberries

>> Pinching the primocanes (removing the growing tip) in July to
>> stimulate growth of laterals will also delay fruiting. This is sometimes
>> done to delay harvest until after the intense heat of July.

Thanks Shazaam,

That's a helpful tip. We definitely have hot dry weather during July and August here in the Shenandoah Valley. A bit of a delay might improve my berry quality.