""'Some've' is an accepted abbreviation for 'Some of' in the same way that 'I've' 'I'll' 'We'll' are accepted forms of written or spoken word""

Sorry to spoil your day Happy, but you have actually shot down your own argument with a single bullet, "I've"!

It is an abbreviation for "I have"and so is "some've"
an abbreviation for "some have".

As in "Some've died in battle, and some've died in bed!", it is mostly used in poems, though I have heard it on many occasions in colloquial speech.

Don T.