|
Joined: Mar 2003
Posts: 17,173
Campfire Ranger
|
OP
Campfire Ranger
Joined: Mar 2003
Posts: 17,173 |
I'm thinking about trying Magnum powder in my 300 Win. Mag. with 180 and/or 200 grain bullets. If you have any experience with this powder, I would appreciate any information you might have.
Thanks for your time.
Last edited by Hammerdown; 12/09/09.
Randy NRA Patriot Life Benefactor
|
|
|
|
Joined: Nov 2004
Posts: 373
Campfire Member
|
Campfire Member
Joined: Nov 2004
Posts: 373 |
It will actually out shoot my RL25 load for 300 rum with 200 gr Accubond. Its about 100 fps slower and the group size with RL25 is small to begin with. I'd not hesitate to use it if my supply of RL25 dwindles...which it could. I'd start with starting load just to see where you are with velocity compared to what your supposed to get and start working my way up in charge weight until you get to your target velocity (as listed) (+ or - for difference in bbl length) or your gun tells you when enough is enough ie--pressure signs. Accuracy came in for me as I approached the upper end not right at it.
|
|
|
|
Joined: Oct 2007
Posts: 1,267
Campfire Regular
|
Campfire Regular
Joined: Oct 2007
Posts: 1,267 |
I have used this powder in my 264 mag and 270 wsm. I worked up a load in the 264 using the 120 gr ttsx bullet, it is the most accurate bullet/powder combination that I have found so far. The 270 wsm is a different story, I worked up two loads using the 150 gr nosler partition and the 150 gr Barnes X bullet, with this load combination I was getting good groups and good velocity (2980 fps) but when the temperature dropped to below 60 degrees I would lose about 80 fps velocity. If you want to try this powder I would suggest that you use the hottest primer available, either winchester magnum or federal magnum primers. This is a slow ball powder, good luck.
|
|
|
|
Joined: Apr 2009
Posts: 338
Campfire Member
|
Campfire Member
Joined: Apr 2009
Posts: 338 |
Meters excellent. Several sub-inch loads and the most accurate powder across the board in my 8mm remington mag. Haven't had time to try it in anything else but I am pleased.
|
|
|
|
Joined: May 2008
Posts: 733
Campfire Regular
|
Campfire Regular
Joined: May 2008
Posts: 733 |
Freddy, what was your load in the 264 with the 120 TTSX, please? BBerg
|
|
|
|
Joined: Nov 2004
Posts: 1,207
Campfire Regular
|
Campfire Regular
Joined: Nov 2004
Posts: 1,207 |
I use magnum in a browning ss x-bolt 300 win mag. Max load is at 3130 avg with 180 partitions and moa at 100yds.
|
|
|
|
Joined: Mar 2003
Posts: 17,173
Campfire Ranger
|
OP
Campfire Ranger
Joined: Mar 2003
Posts: 17,173 |
Thanks for your help so far, I really appreciate it.
byd, How much Magnum are you using with the 180 Partition.?
Thanks
Randy NRA Patriot Life Benefactor
|
|
|
|
Joined: Oct 2007
Posts: 1,267
Campfire Regular
|
Campfire Regular
Joined: Oct 2007
Posts: 1,267 |
I started with 62 gr and stopped at 68 gr, I got the data from Barnes, 69 gr is book max, if you need assistance give them a call, they are very helpfull.
68 gr Ramshot Magnum Winchester cases 120 gr Barnes ttsx Winchester large mag primer Extreme spread 25 fps Standard deviation 11 fps Average muzzle velocity 3268 fps Winchester Pre 64 M 70 with 26 inch barrel
Groups were running about 1 1/8 inch,by some peoples standards those groups may not be satisfactory but considering that I was getting 1 1/2 to 2 inch groups with other powder/bullet combinations that is an improvement as far as I am concerned.These loads show no signs of pressures in my rifle, but as always start low and work up, good luck.
|
|
|
|
Joined: Oct 2008
Posts: 1,187
Campfire Regular
|
Campfire Regular
Joined: Oct 2008
Posts: 1,187 |
Not that it helps you a bunch, but Magnum showed good promise (before winter slowed me down and I switched barrels for a while) in my .264 WSM under 129-gr Hornady SSTs. Meters nicely, too.
|
|
|
|
Joined: Nov 2004
Posts: 1,207
Campfire Regular
|
Campfire Regular
Joined: Nov 2004
Posts: 1,207 |
80 grains avg. 3050 81 grains avg. 3100 82 grains avg. 3137 26 inch barrel
|
|
|
|
Joined: Mar 2003
Posts: 17,173
Campfire Ranger
|
OP
Campfire Ranger
Joined: Mar 2003
Posts: 17,173 |
I now have 2 lbs. of Ramshot Magnum. This should be enough to get me started.
Thanks again for the advice.
Randy NRA Patriot Life Benefactor
|
|
|
|
Joined: May 2008
Posts: 733
Campfire Regular
|
Campfire Regular
Joined: May 2008
Posts: 733 |
Freddy,
You say you stopped at 69gr that gave you good accuracy at 3,268fps... How close do you feel you were to maximum load?
Mule Deer has a favourite load of 69gr behind the Speer 140gr bullet for 3,200fps+ which would make me think 3,400fps would be safely attainable with the same powder and 120gr bullets.
BBerg
|
|
|
|
Joined: Oct 2007
Posts: 1,267
Campfire Regular
|
Campfire Regular
Joined: Oct 2007
Posts: 1,267 |
For my rifle I would say I was close to maximum, Barnes says 69 gr is max, they got 3303 fps with max load. When I worked up this load I used a different method than I ususally do when I work up loads. Nosler recomends this method, I took some factory winchester 140 gr power point rounds and pulled the bullets and discarded the powder and primers. I then replaced the primers, powder and bullets, and worked up the load starting with the starting load, I fired a factory round first, then I fired all the rounds that I had worked up in 1/2 grain increments, after I fired the 68 gr load I fired one more factory round. I went home and measured all the rounds on the belt, the 68 gr load expanded .0002 less than the factory loads. I measured all the rounds before I fired them, they all measured the same. Nosler swears by this method however you need some factory rounds on hand and we both know that factory stuff is very expensive. Barnes say to work up the loads and stop and back off a grain if expansion on the belt reaches .001. You have to remember that not all rifles are alike, a safe load in your rifle may not be safe in someone else rifle and vice versa.
|
|
|
|
Joined: Jan 2002
Posts: 12,852
Campfire Outfitter
|
Campfire Outfitter
Joined: Jan 2002
Posts: 12,852 |
In my limited experience, Magnum at pressures around 50 - 55KPSI are scary, scary consistent. FWIW, Dutch.
Sic Semper Tyrannis
|
|
|
|
Joined: Mar 2003
Posts: 17,173
Campfire Ranger
|
OP
Campfire Ranger
Joined: Mar 2003
Posts: 17,173 |
Thanks Dutch, for the PSI info. I will start loading for this in the A.M. 200 grain NAB and Partition 180 grain NAB and Partition 180 grain T-TSX
That should keep me busy for a few days.
Merry Christmas
Randy NRA Patriot Life Benefactor
|
|
|
|
612 members (1beaver_shooter, 160user, 10gaugemag, 1eyedmule, 10Glocks, 1badf350, 48 invisible),
2,440
guests, and
1,331
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums81
Topics1,191,834
Posts18,478,050
Members73,948
|
Most Online11,491 Jul 7th, 2023
|
|
|
|