Load data for .300 Win Mag 200gr. Accubond

[DrMike]

The burn rate can vary from lot-to-lot. The composition is somewhat complex in that while proportionality of deterrents and other compounds added to the propellant are constant, adherence can vary. Also, size of the granules and perforations can vary slightly. However, the effects are cumulative. Practically speaking, when burn rate varies, velocity will differ as well. You really can't make comparisons between different rifles as there are other variables; you can only make comparisons based upon performance in your own rifle.

 

[DrMike]

Looks like its very important to verify your loads before you hunt...

It is a good plan to verify velocity and POI for each load whenever changing any lot--especially powder and/or primers.

 

[Ridge_Runner]

Need a bit of help. Chrono'd my Remington 700 300 win mag (5R) 26" barrel with 200 gr accubonds today and was amazed to see 2741 fps. Book value shows 2862fps for imr 4831 powder @67 grains. 112 fps slower?
RL 22 72.5 grains chrono'd bit quicker then book @2965fps groups .830"
Note:imr4831 get same hole accuracy likely going to be my load. O.485"

Altitude 5413 ft, 65f 79%rh 30.220Hg

Any thoughts?
Again thanks in advance

Robert

Hodgdons web site lists a max load for a 200 gr PT. with IMR 4831 as 72.5 gr at 2859 fps, I'd start bumping the charge up a bit till you get either close to 2850, see pressure signs, or accuracy goes south. You may get 2900 from it but watch for signs and keep an eye on the chrony, if you go up 1 grain and get 20 fps increase, another grain and another 20 ft increase, when you see the increases get notably smaller you are approaching max pressure. I no longer bother with RE22, just not cosistant enough lot to lot for me to warrant using it.
RR

 

[WYcoyote]

RR gives some good advice.
I would tell you that your rifle seems quite accurate, and I recommend trying H-1000 for stability in temperature swings. See how it shoots. It works well in my Win. M70 with a Benchmark barrel.

 

[Vapor]

RR gives some good advice.
I would tell you that your rifle seems quite accurate, and I recommend trying H-1000 for stability in temperature swings. See how it shoots. It works well in my Win. M70 with a Benchmark barrel.

Thanks
What did your rifle and load chrono?

 

[Ridge_Runner]

why so concerned with speed, shooting a 200 gr AccuBond at 2860 only amounts to 3.5" less drop at 350 yards than the same bullet at 2750. even at 700 yards the difference is only 11". when it comes down to long range shooting BC outruns velocity every time.
RR

 

[Vapor]

why so concerned with speed, shooting a 200 gr AccuBond at 2860 only amounts to 3.5" less drop at 350 yards than the same bullet at 2750. even at 700 yards the difference is only 11". when it comes down to long range shooting BC outruns velocity every time.
RR

Accuracy is the number one concern followed by Fps.
Nosler states the AccuBond shouldnt be used below 1800 fps.
With this information the best accuracy and fps is important.
The difference in the Fps is just part of the puzzle I'm yet to understand.
I greatly appreciate the feedback from you and our forum because real world experience means quit a bit.

Thanks
Robert

 

[WYcoyote]

RR gives some good advice.
I would tell you that your rifle seems quite accurate, and I recommend trying H-1000 for stability in temperature swings. See how it shoots. It works well in my Win. M70 with a Benchmark barrel.

Thanks
What did your rifle and load chrono?

Altho RR is correct about the velocity it is a valid question and is part of the equation in a hunting load.
I can hit 3000 fps with no sign of pressure but my best accuracy is around the 2975 mark.
That is with a 24" 3-groove barrel, and the bullet seated to barely fit the magazine in my M70 at 3.39" OAL.

 

[4th_point]

Hi Everyone,

First post for me here.

I had a blued Tikka T3 in 300 Win Mag last year. I tried Retumbo at max published charge with the 200gr NAB and got 2650 fps at 3.35" COAL. Shot well under an inch at 100 yards, but seemed slow for this cartridge. Powder was also getting compressed. You could seat the bullet out farther, but it wouldn't fit the mag.

I also tried H1000 at max published charge and got 2700-2750 fps if I remember correctly. Accuracy was horrible though. It seems that many people are getting good accuracy at 2600-ish, and 2800-2900-ish with 24" barrels. Could be accuracy nodes, pressure wave timing, or who knows what. What's interesting is that many seem to find good accuracy at similar velocities. Others believe that nodes are bogus. Run a ladder test and decide for yourself. Ladder test is fast, whether its nodes at work or not.

I now have a Tikka Super Light and am using Ramshot Magnum. Velocity is 2900 fps, and 3-shot group is under 1/2" at 100 yards. 4-shot is under 7/8". I shot ladder tests at 100 yards and 200 yards and found that the rifle wasn't too picky above 2800 fps. Again, could be a node I don't know, but its in-line with other 300 shooters. I'll take 1/2" groups whatever the explaination. Shoot the ladder and you can see what your rifle likes, 200 yards or more is best.

I thought about RL22 but after reading some of Barsness' comments on temperature instability of this powder I wanted something else. He wrote about Ramshot Magnum in one article so I decided to give it a try. I e-mailed Ramshot and they provided a load range. Great customer service from them. I plan to try more of their powders. Magnum burns much more cleanly than Retumbo or H1000. No sooty necks, and no residue. It also meters extremely well, and seems to burn even cooler than Retumbo. Overall I couldn't ask for more, as long as its temp stable with my load.

Oh, Ramshot recommends 75.2 to 83.5gr of Magnum with the 200gr. Work up slow. My load is near the top. I'm using Rem cases and Fed 215.

By the way, total rifle weight with 2-7x is about 7lbs and it has some kick!

Good luck!

 

[DrMike]

4th_point,

Welcome to the forum and thanks for sharing. I would agree that you should have had better velocities with Retumbo in your T3. I would suggest that you had a slow lot, especially in light of the velocities you reported with H1000 (more in line with what would be expected), However, it sounds as if your present rifle is giving you the performance you should expect. I haven't observed the reported temperature sensitivity with RL22, and I use quite a bit. It is true that I don't do much shooting in weather than is much warmer than 80 F. Consequently, the extreme cold doesn't degrade velocities with RL22 any more than it does other powders. I do like many of the Ramshot powders. Our problem in Canada is the uncertainty of supply. I burn a lot of Magnum and TAC, and I'd burn more Hunter if it was more generally available. I agree about the good customer service. I have found similar good customer relations with almost all the powder manufacturers as well as most of the bullet manufacturers. Again, thanks for sharing. I trust we'll see you as a regular around here.

 

[Desert Fox]

300 Winchester Magnum will be best serve with powder no slower than 7828 or Reloader 22. I don't think you can get optimum velocity using Retumbo or Reloader 25. The 300 just don't have the case capacity like the Weatherby.

 

[Ridge_Runner]

Hi Everyone,

First post for me here.

I had a blued Tikka T3 in 300 Win Mag last year. I tried Retumbo at max published charge with the 200gr NAB and got 2650 fps at 3.35" COAL. Shot well under an inch at 100 yards, but seemed slow for this cartridge. Powder was also getting compressed. You could seat the bullet out farther, but it wouldn't fit the mag.

I also tried H1000 at max published charge and got 2700-2750 fps if I remember correctly. Accuracy was horrible though. It seems that many people are getting good accuracy at 2600-ish, and 2800-2900-ish with 24" barrels. Could be accuracy nodes, pressure wave timing, or who knows what. What's interesting is that many seem to find good accuracy at similar velocities. Others believe that nodes are bogus. Run a ladder test and decide for yourself. Ladder test is fast, whether its nodes at work or not.

I now have a Tikka Super Light and am using Ramshot Magnum. Velocity is 2900 fps, and 3-shot group is under 1/2" at 100 yards. 4-shot is under 7/8". I shot ladder tests at 100 yards and 200 yards and found that the rifle wasn't too picky above 2800 fps. Again, could be a node I don't know, but its in-line with other 300 shooters. I'll take 1/2" groups whatever the explaination. Shoot the ladder and you can see what your rifle likes, 200 yards or more is best.

I thought about RL22 but after reading some of Barsness' comments on temperature instability of this powder I wanted something else. He wrote about Ramshot Magnum in one article so I decided to give it a try. I e-mailed Ramshot and they provided a load range. Great customer service from them. I plan to try more of their powders. Magnum burns much more cleanly than Retumbo or H1000. No sooty necks, and no residue. It also meters extremely well, and seems to burn even cooler than Retumbo. Overall I couldn't ask for more, as long as its temp stable with my load.

Oh, Ramshot recommends 75.2 to 83.5gr of Magnum with the 200gr. Work up slow. My load is near the top. I'm using Rem cases and Fed 215.

By the way, total rifle weight with 2-7x is about 7lbs and it has some kick!

Good luck!

Ramshot powders are double base powders also, so they will be more temp. sensative than single base powders. thats also why it seems to bun cooler, and its burning clean cause your at about max pressure, just the way double base powders are.
RR

 

[SJB358]

Hi Everyone,

Good luck!

Ramshot powders are double base powders also, so they will be more temp. sensative than single base powders. thats also why it seems to bun cooler, and its burning clean cause your at about max pressure, just the way double base powders are.
RR

I may pick up some Ramshot Magnum and TAC the next time I am buying some powder. I hear too much good about them both to ignore them. Scotty

 

[4th_point]

I should have mentioned that the magazine limited my COAL in the Tikka, and I think that was the reason I couldn't get pressures and velocities up to where they should be. If the bullet was seated out farther, I'm sure Retumbo and H1000 would have done better.

 

[338 Ultra]

I am using H-1000 and getting 2820 with the 200 AB out of a 24" barrel over a 215M primer. I am also over book max after working up slowly and carefully. I am also loading longer than sammi max length as my throat and mag will allow me to do so not by a huge margin mind you but that is where I found the accuracy. My load is well compressed though but brass life is excellent. I have made the switch to Nosler cases for the 300 and have been able to double my reloads per case versus what I was using before ( winchester) which is now hit and miss with quality. When I can put 3 200 AB's into one egg shaped hole at 100 or into 1-1/2" at 300 I am a pretty happy man. I do wish though I could recover one to see what they look like, so 2 moose and 3 elk later I still do not have a 200 AB to clean up and admire. I have not seen the sooty neck issue that other folks have with H-1000 in my 300 perhaps I am making the right amount of pressure with what I am doing to get a good seal or perhaps my factory chamber and neck were cut with a new fresh reamer ( luck of the draw I guess) so tight tolerences might be helping me. In any event I am a happy camper with what I have for my 300 but as an after effect my tracking skills are starting to diminish a little bit. Big stuff does not make it out of sight when I put it where it needs to go. :mrgreen:

 

[Ridge_Runner]

I am using H-1000 and getting 2820 with the 200 AB out of a 24" barrel over a 215M primer. I am also over book max after working up slowly and carefully. I am also loading longer than sammi max length as my throat and mag will allow me to do so not by a huge margin mind you but that is where I found the accuracy. My load is well compressed though but brass life is excellent. I have made the switch to Nosler cases for the 300 and have been able to double my reloads per case versus what I was using before ( winchester) which is now hit and miss with quality. When I can put 3 200 AB's into one egg shaped hole at 100 or into 1-1/2" at 300 I am a pretty happy man. I do wish though I could recover one to see what they look like, so 2 moose and 3 elk later I still do not have a 200 AB to clean up and admire. I have not seen the sooty neck issue that other folks have with H-1000 in my 300 perhaps I am making the right amount of pressure with what I am doing to get a good seal or perhaps my factory chamber and neck were cut with a new fresh reamer ( luck of the draw I guess) so tight tolerences might be helping me. In any event I am a happy camper with what I have for my 300 but as an after effect my tracking skills are starting to diminish a little bit. Big stuff does not make it out of sight when I put it where it needs to go. :mrgreen:

I've shot 27 deer with accubonds, 160 gr .284, from 307 yards to 1350, only one I ever recoverd I shot into a tree at close range, then dug it out, was pretty impressive.
RR

 

[nomosendero]

300 Winchester Magnum will be best serve with powder no slower than 7828 or Reloader 22. I don't think you can get optimum velocity using Retumbo or Reloader 25. The 300 just don't have the case capacity like the Weatherby.

I guess that depends on how far out you can seat bullets & other factors. I get better velocity with my 300WM by going from RL22 to the slower RL25 & tons of folks get good vel with H1000.

 

[Desert Fox]

300 Winchester Magnum will be best serve with powder no slower than 7828 or Reloader 22. I don't think you can get optimum velocity using Retumbo or Reloader 25. The 300 just don't have the case capacity like the Weatherby.

I guess that depends on how far out you can seat bullets & other factors. I get better velocity with my 300WM by going from RL22 to the slower RL25 & tons of folks get good vel with H1000.

H1000 is just a tad slower than RE-22. I use it on my Model 70 Laredo LRH for a long time. With my magazine internal dimension maxed at 3.380", I can only stuffed 81 grain (Hodgdon listed the max load at 83 grain) of H1000 into a Federal Gold Medal Match Brass at slightly compressed load using 180 grain Hornady BTSP Interlock. Velocity was around 2,880 fps from a 26" barrel. Switched to IMR 7828 using 76 grain for the same bullet and I can get to 2900+ with ease. Load density is around 90%.

 

[w8n4rut]

i can get 90gr of retumbo in nosler brass under a 165bt good for 3300 out of my 26'' tube.

 

[clambdin]

You may want to look at Magpro I get great accuracy and velocity in the 300WM and 200gr pills with it..It is probably a little more temp stable than RL22..