Well, I can't seem to resist the 'shiny' stuff in Sinclair's catalog so I decided to order one of their new Shoulder Bump Gauges in .30 cal to try out.
Up until now I have been using the Hornady LNL Cartridge Headspace Set, which is a GREAT tool for measuring shoulder bump. Intuitive and easy to use.
I have to say thou, IMO, the Sinclair insert is a big improvement. The machine work and material quality is much better than the Hornady 2. The BIGGEST benefit: having the insert itself machined to match the the shoulder angle of the case. The #1 thing this does is serve to square the case head up to the blade of your calipers to ensure you get accurate and repeatable measurements.
Plus if you already have a Hornady Comparator body, all you need to order is the insert and you are GTG.
For those that aren't familiar with either tool here are pics of both the inserts, so you can see what I'm talking about. The first is the Hornady and the second pic is the Sinclair insert:
Hornady:
Sinclair insert in Hornady Body:
Anyway thought I'd let you gents know about these. The only issue as far as I can see is that if you want to gauge loaded rounds, you need the longer Comparator Body, which Sinclair sells as well. You can gauge loaded rounds with the Hornady 'as is'. To me thou the quality of the Sinclair insert more than makes up for this.
With the Hornady, I have to fiddle around with the case to square the case head to the blade of the caliper, and that's a non issue with these inserts.
Anyway, the question of bumping shoulders comes up a lot here, so I thought I'd give you all a heads up about another option out there.
Up until now I have been using the Hornady LNL Cartridge Headspace Set, which is a GREAT tool for measuring shoulder bump. Intuitive and easy to use.
I have to say thou, IMO, the Sinclair insert is a big improvement. The machine work and material quality is much better than the Hornady 2. The BIGGEST benefit: having the insert itself machined to match the the shoulder angle of the case. The #1 thing this does is serve to square the case head up to the blade of your calipers to ensure you get accurate and repeatable measurements.
Plus if you already have a Hornady Comparator body, all you need to order is the insert and you are GTG.
For those that aren't familiar with either tool here are pics of both the inserts, so you can see what I'm talking about. The first is the Hornady and the second pic is the Sinclair insert:
Hornady:
Sinclair insert in Hornady Body:
Anyway thought I'd let you gents know about these. The only issue as far as I can see is that if you want to gauge loaded rounds, you need the longer Comparator Body, which Sinclair sells as well. You can gauge loaded rounds with the Hornady 'as is'. To me thou the quality of the Sinclair insert more than makes up for this.
With the Hornady, I have to fiddle around with the case to square the case head to the blade of the caliper, and that's a non issue with these inserts.
Anyway, the question of bumping shoulders comes up a lot here, so I thought I'd give you all a heads up about another option out there.
