Best Highpower primer is Jim Owen's
Leather Sling and Shooting Positions. Ideal if you're starting out on the Service Rifle and it's concise--you may as well get all of his books if you get one (
[URL="http://www.jarheadtop.com"]www.jarheadtop.com)[/url]. The Tubb book is good--they're both the same (
Highpower Rifle and
The Rifle Shooter, but the new one has a lot of discussion on why you need to be shooting his Tubb2000 rifle. It's a little more advanced and definitely geared more towards the match rifle shooter. The Constantine book is good, but it's
huge and isn't as good on actual shooting technique. Definitely worth the read though.
Ty