450Bushmaster.net

I just picked up my first 450bm, a Ruger American Ranch

I have been reloading since 1982, but I've never loaded for this caliber.

I have purchased bullets, cases, dies, case trimmers and case guage. I'm ready, just need data.

I have Barnes TSX 275g, Starline cases, and probably any powder that would be recommended.

Where can I find data for the Barnes bullets? I've searched through all of my current manuals and can only find data for the 250g FTX, which I do not plan on using.

I wouldn't mind a pet load to try so I can sight it in and then begin load development

Thanks in advance!

Never mind, I found data on Hodgdons website.

Sight in rounds loaded at a safe 35.5g of h110, and test loads are ready starting at min and working to max at .5g increments

Just need some nice weather to fire up the LabRadar and run some down range.

Welcome aboard !!! You'll have fun with that Ruger and can turn the burners on those Barnes with the slower powders.

The Hodgdon data seems conservative, 33.4g to 37.6g of H110. I know of two reliable sources loading to 38g and 38.5g, a full grain heavy.

Thoughts?

SARuger wrote:The Hodgdon data seems conservative, 33.4g to 37.6g of H110. I know of two reliable sources loading to 38g and 38.5g, a full grain heavy.

Thoughts?

Reloading books, because they're "The Written Word", err on the side of caution. Also they tend to play to the least common denominator and that's the 450b in an AR platform. Just like when published loads have to take into consideration that a particular caliber was invented back when actions were not made as strong as modern manufacturing affords. IE Modern 45-70 firearms are made stronger than their antique predecessors such as the " 1884 Trapdoor". The book's publisher doesn't know what the owner's rifle is going to be.

Hoot

As Hoot said, they will err on the side of caution. Just work up slow and watch everything. I have a few AR's in 450B that I load with the 275 TSX. I load it longer than spec and run more Lil Gun then stated as max in Hodgdon's data. I haven't tried it too much with slower powders, but I'm willing bet you can cram a lot more behind it before seeing pressure issues. It will probably be to your advantage to load the 275 long. I know Al in MI does in his rifles, and has really good results.

I found my accuracy node at 36.7g of H110. There was a second node developing at 38.3g but I was seeing pressure signs at 38g. I took it to 38.5 and backed off.

After finding the node at 36.7g, I loaded 5 at the shooting bench and stacked them through the same hole at 100yrds.

This rifle is a shooter!

That was easy. MP 300 is another good one. It is just a touch slower than H110. But, I'd say you found the magic spot, so stick with it.
Way better off than the factory junk bullets