www.hipowersandhandguns.com
Very good infor of the highpower.
YEs, the HP can be carried in locked&loaded" normally a thumbreak holster, with the strap between the hammer and FP is desirable.
Refer to Bianchi's "blue steel & gunleather" book for additional info.
There is also a modification called "fast-n-safe" that allows a hammer down but actuating the safety flips the hammer to full cock and ready to shoot.
It describe in Camps website.