510 Whisper Load data

[Greek]

I am going to pick up my new (to me) Remington 700 chambered in 12.7x48 (I think it's the same as the 510 Whisper)

Are there any good sorces for loading data?

I am going to be loading 647 ball and 690 AP bullets sub sonic for now.

Thanks

John

[THE DOCTOR]

I can make brass from the 338 Lapua if you need some.

I use WC820 mil surplus powder and H110 as well With either one start around 23 grains and work up from there depending on barrel length you shouldn't have to go over 27 grains to transition to supersonic then back off if you don't have a chrono

good luck

DOC

[Greek]

Thanks DOC

If I can not get H110 will Win.296 work?

Can you use any other powders?

Thanks

John

[dksd39]

You might also consider LilGun. I like it better than 110 and have found to be cleaner. Depending on barrel length starting 23gr would be a good start.

[THE DOCTOR]

Yes 296 should work with similar charge weights

[Greek]

Thanks guys!

I am going out today to shoot a revolver match but, after I am going to try out this rifle. I still have to break it in but, I will try to get about 5 rounds down range.

Thanks

John