Is this fast?

[jhutto]

how does 2850 FPS sound for a 208gr .30cal bullet?
Fast, or slow?
This is out of my 300 RUM...
Thanks

[longtooth]

I think that is awful fast w/ that heavy a bullet.
Who makes the 208 gr bullet???

[jhutto]

Hornady.. the 208gr A-Max... B.C. 0.650

It is a new product. So there is no data out on the bullet/powder/cartridge I am using. Right now I am pushing it with 98 grains of Hodgdon US869. There are currently no signs of overpressure (that I see). I am considering moving to a higher charge after I test a few more rounds [abbreviated profanity deleted] consistancy.

[Thane]

According to the Hornady manual, 2800 fps/208gr isn't all that fast from a .300 RUM. The heavier 220gr bullet is listed as being safely driven to 3000 fps (and the 190gr up to 3200 fps); I imagine you could probably hit 3100 fps/208gr with the right powder/barrel length combination pretty easily.

My question is, "What ARE you hunting?!?" I can't imagine any game in Texas that couldn't be taken with a .300 Savage and a 150-grain bullet (much less any game in North America).

Or are you hot-rodding this for the same reason I hot-rod .45 LC loads in a Ruger - the "Because I can and it's fun" reason? Either way, good luck and safe loading!

[HankB]

I don't have my notebook in front of me right now, but based on what I remember getting with the 200 grain Partition, I'd say that's about 200 ft/sec faster than what I'd be able to comfortably get out of the 22" barrel of my .30/06.

I don't think your load is fully up to the .300 RUM's potential, but it should do for anything in North America . . . and most of what's in Africa, too. (But then, so will the .30/06.)

[jhutto]

"According to the Hornady manual, 2800 fps/208gr isn't all that fast from a .300 RUM. The heavier 220gr bullet is listed as being safely driven to 3000 fps (and the 190gr up to 3200 fps); I imagine you could probably hit 3100 fps/208gr with the right powder/barrel length combination pretty easily."

This is what I am thinking... I just wanted another opinion. It is a Remmington with a 26'' Factory barrel. and muzzle break (of coarse)

I am neck sizing only, anyone know if there is any major problem with this? I have heard a lot of stories about the case getting to long to the shoulder... I haven't seen much if any OAL case length expansion. less than a thousandth, of coarse I have only fired the cases twice.


"My question is, "What ARE you hunting?!?" I can't imagine any game in Texas that couldn't be taken with a .300 Savage and a 150-grain bullet (much less any game in North America). "

I plan on hunting...anything . mostly paper though. the amax isnt really a hunting projectile, but at those speeds I'm sure it could still kill.

[jhutto]

Hey What conclusions can be drawn from this data??
Looks to me that 2980-3000fps is all I can get even if I keep adding mor of this powder. I would guess there is not much reason to go over 99-99.5 grains. Is this what you guys gather? Thanks.


Cartridge Load Information
~~~~~~~~~~~~~~~~~~~~~~~~~~
Load Name: 300RUM-004
Bullet Mfg: Hornady
Bullet Type: #30732 A-Max
Bullet Caliber: .308
Bullet Weight: 208
Ballistic Coeff: 0.650
Powder Mfg: Hodgdon
Powder Type: US869
Powder Weight: 98.5 - 100.8
Primer Mfg: REMINGTON
Primer Size: 9 1/2 LRM
Case Mfg: Remmington
Case # Times Loaded: 1
Cartridge OAL: 3.830
Av. Group Velocity: 2977
Cartridge Mfg Date: 5/20/07
Cartridge Lot Number: 004
Moly Coated: No
Crimped: No

Shot String Data FPS Type of Powder Grains of powder
~~~~~~~~~~~~~~~
# 1) Velocity: 2945 Powder us869 98.5
# 2) Velocity: 2948 Powder us869 98.7
# 3) Velocity: 2948 Powder us869 98.9
# 4) Velocity: 3008 Powder us869 99.0
# 5) Velocity: 2984 Powder us869 99.1
# 6) Velocity: 2986 Powder us869 99.2
# 7) Velocity: 2999 Powder us869 99.3
# 8) Velocity: 2986 Powder us869 99.4
# 9) Velocity: 2981 Powder us869 99.5
#10) Velocity: 2983 Powder us869 99.6
#11) Velocity: 2988 Powder us869 99.7
#12) Velocity: 2992 Powder us869 99.8
#13) Velocity: 2980 Powder us869 99.9
#14) Velocity: 3003 Powder us869 100.0
#15) Velocity: 2980 Powder us869 100.1
#16) Velocity: 3003 Powder us869 100.2
#17) Velocity: 2994 Powder us869 100.3
#18) Velocity: 2982 Powder us869 100.4
#19) Velocity: 2972 Powder us869 100.5
#20) Velocity: 2968 Powder us869 100.6
#21) Velocity: 3002 Powder us869 100.7
#22) Velocity: 2979 Powder us869 100.8

[para driver]

the RUM case is based on the Jeffery. I would go for a slower burning powder and filling the case more. You'll have lower pressures and very consistent velocity.

[jhutto]

slower than us 869??
You did see I had over 100 grains in the case right?

[jhutto]

What would you guys think if you saw that data:
Am I doing somthing wrong, why is my velocity not consistantly increasing? OAL within 1 thousandth'', powder measured to tenth of grain. Primer pockets cleaned, reamed, etc.

"Shot String Data FPS Type of Powder Grains of powder
~~~~~~~~~~~~~~~
# 1) Velocity: 2945 Powder us869 98.5
# 2) Velocity: 2948 Powder us869 98.7
# 3) Velocity: 2948 Powder us869 98.9
# 4) Velocity: 3008 Powder us869 99.0
# 5) Velocity: 2984 Powder us869 99.1
# 6) Velocity: 2986 Powder us869 99.2
# 7) Velocity: 2999 Powder us869 99.3
# 8) Velocity: 2986 Powder us869 99.4
# 9) Velocity: 2981 Powder us869 99.5
#10) Velocity: 2983 Powder us869 99.6
#11) Velocity: 2988 Powder us869 99.7
#12) Velocity: 2992 Powder us869 99.8
#13) Velocity: 2980 Powder us869 99.9
#14) Velocity: 3003 Powder us869 100.0
#15) Velocity: 2980 Powder us869 100.1
#16) Velocity: 3003 Powder us869 100.2
#17) Velocity: 2994 Powder us869 100.3
#18) Velocity: 2982 Powder us869 100.4
#19) Velocity: 2972 Powder us869 100.5
#20) Velocity: 2968 Powder us869 100.6
#21) Velocity: 3002 Powder us869 100.7
#22) Velocity: 2979 Powder us869 100.8"

[HankB]

If you're firing one shot at each level, with only 0.2 or 0.1 grain increments in that big case, you're not getting any statistically meaningful data - the incremental velocity increase for adjacent loads is well within the normal extreme spread you'd expect for either load.

Try firing 5 or 10 rounds at, say, 99.0 grains, and then repeating at 100.0 grains.

At some point, you're likely to find that velocity increases for incremental powder increases diminish . . . that would be an indication that you're at or near the limit for that combination of components.

[jhutto]

Yea, the data didn't seem to mean much to me, no obvious trends. I will try as you say. 5 at 99, 100, and 101.

Thanks!

[Houston1944]

Speer reported a few years ago that it takes a minimum of 8 shots to prove out a load. Having shot some good groups with 4 or 5 shot loads only to have them go south on me when I came back with a 10 shot batch I have become a believer in their statement. One shot tests really don't tell you much.