I don't own any of these Yaffa/Page issues, but in a circuitous route which I wont detail here, I've discovered that all three issues share the same contents.
Badman Western Library #2 dates from c.1971, Gunfighter Library #6 c.1972, and each feature a new Keith Chatto cover.
I'm not sure when Bullet Western Library #2 was published - the data on the pre-Marvel $0.60 cover price Yaffa/Page digests is still inconclusive to me. Maybe others have a firmer idea.
What does interest me is whether there were more editions of this issue published. Is there a $0.30 edition under a different title? Was Badman Western Library #2 the first time this pairing of stories was published in a single edition? Strange to say, but this intrigues me more than reading or owning these issues.
See below for sample pages sourced from Bullet Western Library #2.
Update 9/9/2018: I can confirm Bullet Western Library #1 is also a reprint of the above comics:
And so, the $0.30 cover price edition appears. More to come?