Missouri Bullet 475 Thumper 340gr RNFP and H110

[Rug480]

Man I'm having no luck finding any loads for this round. I emailed Hodgdon, waiting for their reply, but anyone here load this round for 480 Ruger? I know H110 likes full charges but closest I could find is 355gr on Hodgdon's website.

[Rug480]

No luck from Hodgdon... can't advise on this particular round, so any input is greatly appreciated. I suppose I could run with trailboss but I have 500 coming and wanted to see them hit some 1400fps with the H110/296 I have.

[475AR]

No luck from Hodgdon... can't advise on this particular round, so any input is greatly appreciated. I suppose I could run with trailboss but I have 500 coming and wanted to see them hit some 1400fps with the H110/296 I have.

Post the bullet weight (actual), diameter and length as well as the cartridge over all length you plan to use and I will run it thru Quickload. I will need to know the barrel length as well. QL will get you in the ballpark for starting loads.

[Rug480]

Thx 475!, will do as soon as I get them

[DW475]

When I seen the thread "Missouri Bullet 475 Thumper" it got me excited since I cast for my 475 Linebaugh. Have you checked any of the Lyman cast bullet load data to see if they have something listed for your 480?

[Rug480]

Here’s what I could measure with a gram scale and electronic calipers on a sample of five

.475 Thumper

22g-339.5gr
Length .814 Width .4765
.811 .4765
.815 .4765
.817 .4765
.8115 .4765

Case length 1.28
Cannelure to meplat .355
COL 1.635

[Tom W.]

Got free ranging T- Rex critters in your part of Georgia?

[DangerousDave]

I recently made some loads for my 480 using W296. I have an NEI mold which throws two different boolets. The light one comes out at 363 gr with gas check and lube. The heavy 433gr lubed. I size to .478". Generally, I get no leading. Can't remember off the top of my head how many grains of powder I settled on with the lighter, but I did go with 20.0 for the heavies. In my experience, one can safely use data for heavier bullets. It just yields more velocity with the lighter ones.

[475AR]

Here’s what I could measure with a gram scale and electronic calipers on a sample of five

.475 Thumper

22g-339.5gr
Length .814 Width .4765
.811 .4765
.815 .4765
.817 .4765
.8115 .4765

Case length 1.28
Cannelure to meplat .355
COL 1.635

Thanks,
I will run the data and pm you the info. Once you test the data you can post your findings.

[Rug480]

Just a follow up with my findings

A gent from a FB group advised he tried the same bullet with 25-27.5gr 296.
He felt 27.5 was too hot and kept 27.2gr as his max

I ran a few rounds loaded with 296 with 25, 25.5, 26gr and had no issues. No cratering on the primers.. just a healthy dose of recoil