Ramshot Loading Data for the 450B

[pitted bore]

I cannot find that this source of loading data has been referred to or posted previously on this site; if it has, my apologies for duplication.

The Ramshot reloading manual, which I think is dated 7-2-13 (July 2? Feb 7?) has a set of very helpful reloading data for the 450 Bushmaster cartridge. The data tables include pressure measurements, something Hornady does not furnish with its handbooks.

Data are included for these powders:

• Accurate No. 9
• Accurate 4100
• Accurate 5744
• Accurate 1680
• Ramshot Enforcer

Bullets listed include:

• 200 gr Hornady FTX
• 200 gr Sierra FPJ
• 225 gr Hornady FTX
• 230 gr Sierra FMJ
• 250 gr Nosler HP
• 300 gr Hornady XTP
• 325 gr Barnes Buster

Notice that there are four bullets lighter than the lightest for which Hornady reports loading data, and one bullet that is heavier the heaviest in Hornady's manual.

The tables include starting loads & velocities, and max loads with pressures and velocities for most combinations of powder and bullet.

Test environment: Barrel: 16”; Twist: 1-24”; Primer: WIN WSR; Bullet Diameter: 0.451”; Case: Hornady; Max Case Length: 1.700”; Trim Length: 1.695".

The manual can be read or downloaded as a pdf file from the Ramshot website: http://www.ramshot.com . The list of loading data for the 450B is on page 53.

I think the data are really helpful. Thanks, Ramshot/Accurate.

--Bob

[tbirdman74]

That's some good info PB, hadn't seen it in there before.

[Hopalong]

Yeah, thanks PB. Looks like that data is a bit less conservative that Hornady's, at first glance. Particularly with the 300gr bullets. I've got some room to work with 1680 and those blem bullets... Not that I won't be careful, but I had no pressure signs with the max Hornady load, right where accuracy really improved.

Hop

[TacoTaco]

It's nice to see "official" data starting to trickle out.

One thing of note though, is that they don't seem to be utilizing the entire mag length--they seem to be worried more about seating the bullet to the cannelure rather than take advantage of the full 2.25" that they have at there disposal. You can squeeze a little more velocity out of the round and keep pressures in check if you take advantage of the entire mag.