I don't find a significant difference between the US and Spanish CPHP 14.3 g .22s. I will continue experimenting as my two FX Streamlines, FX DRS, AA S510XS, and Aremex Gauntlet seem to like them. They generally do better, or close enough to more than justify the cost difference against JSB & H&N.
I shoot (500) - (1,000) each week, but since conditions are often windy, I am reluctant to state hard conclusions, OTOH I am closing on 90,000 pellets, 95% CPHP in the last (3) years shooting.
JSB are often skirt-damaged in shipment, and H&N are not nesessarily as well received on average by my guns.
Being in Canada, does insert some serious cost, choice/availabilty, and shipping issues. I am down to less than (20) tins of CPHP so need to start shopping.
Will need to dig around as I may have exhausted my US supply. I prefer US to other countries, simply because I have far more American friends than any other nationality.
That I shoot silhouettes, off the bench, from 40 to 160 meters (mostly 50 yards and 160 meters) adds a dimentia that others don't experience.
I have found that weighing and sorting to 1/10 grain batches cuts down on flyers.