| Posted: Sat Aug 1st, 2009 05:00 AM |
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CB900F
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Fella's;
I'm now in possession of a couple of .300 Winchester magnums that have severe quality control issues. Due to that, I'm going to start well down on the available horsepower curve for them.
What I'm looking for are loads that essentially duplicate .30-06 180 grain bullet ballistics in the .300 Winchester magnum. Therefore, lets say something around 2800 - 2900 fps with standard Speer, Sierra, or Hornady 180 grain bullets. Since the last fps of velocity is not what's being sought after, accuracy is the watchword here.
I've got several powders known to produce good loads in the .300 available to me, ie: N160, RL19 & 22, and IMR4350. I always prefer to use Winchester brass and either CCI or Winchester primers.
So, got any home-brews that aren't shoulder wreckers & put the bullet on the mark?
900F
PS. The first gun is a 26" barreled Winchester model 70 & the other is a Browning A-bolt. Neither gun is mine, I've just been tasked with the project. As for the QC issue; both have the bolts placed on the incorrect, or 'right', side of the action.
F
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| Posted: Sat Aug 1st, 2009 12:55 PM |
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swampshooter
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Due to the fact that reloading manuals are normally optimistic when it comes to their listed velocities, 2900fps is real close to maximum velocity in this cartridge. My 300 win. mag. is now on it's third barrel and I've chronographed numerous loads in it. I've always been an experimenter, trying a lot off different loads. 2800-2900fps will not produce any noticeable reduction in recoil or muzzle blast. You could try listed starting loads with the powders that you have on hand, maybe they will achieve your goals. My favorite reduced load in my .300 win mags has been 35grs./imr 4064/170gr. flat nose or 180 round nose bullet/ magnum primer. This load approximates 30-30 velocities and is very pleasant to shoot. I've increased this load up to 40grs., with velocities running about 2350fps. but the 35gr. load was more accurate in my rifle. DO NOT REDUCE THE POWDERS YOU LISTED AS AVAILABLE TO THESE LEVELS. Another reduced load that shot very well in my rifles ( one moa) was 64-66gr./4350/165 spitzer/magnum primer. Velocities were around 2750 and many groups were 1/2". Another good load was 57gr./imr 4320/150gr. bullet/magnum primer. Velocities were around 2650fps with this load. Last edited on Sat Aug 1st, 2009 01:24 PM by swampshooter
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| Posted: Sat Aug 1st, 2009 02:58 PM |
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miestro_jerry
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I load the case with a lesser charger, loosely based upon a less cartridge and then fill the case with Creme of Wheat (COW).
I have taken the 300 RUM and redeuced the load to about the power of a 30-06.
Jerry
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| Posted: Sat Aug 1st, 2009 08:33 PM |
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Timberghozt
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CB, I cant help out on downloading a 300 Win..I load mine for accuracy especially but also for the best velocity I can get without sacrificing accuracy.
There are a lot of folks that do the lightened charge less kick thing.Gotta be some solid good loads that arent scapula breaking thumpers for a 300 on the board..
TTT
tg
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| Posted: Thu Aug 20th, 2009 03:43 PM |
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| Posted: Sat Oct 10th, 2009 04:27 PM |
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Shooter308
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good info Mfriman
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| Posted: Sun Oct 11th, 2009 05:33 PM |
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Paul B
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The following is from HANDLOADER MAGAZINE #44 July-August 1973 in and article by John Wooters called STAIRSTEP LOADING THE MAGNUMS.
In the article he gave data to duplicate loads in several magnum cartridges to duplicate lesser cartridges. the folowing is the data he gave for the .300 Win. mag.
To duplicate:
30-06: 150 gr. 62.0 gr. 4895 (doesn't say if IMR or H so I guess either will work.
30-06: 180 gr. 57.0 gr. IMR-3031
.308 Win.: 150 gr. 60.0 gr. 4895
180 gr. 55.0 gr. IMR-4064
30-40 Krag: 150 gr. 56.0 gr. IMR4064
180 gr. 50.0 gr. 4895
30-30 Win. 150 gr. 45.0 gr. 4064 No data for heavier bullets.
That should give you a place to start out. According to the article these are loads he personally worked up.
Paul B.
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| Posted: Sun Oct 18th, 2009 11:38 PM |
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fishdog52
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Paul B, Nice bit of data from the archives. Glad somebody out there knows how to remember access some of this sort of useful stuff! Dave C.
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| Posted: Sun Oct 18th, 2009 11:47 PM |
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Timberghozt
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Gotta ask,what is the use in owning a 300 Win Mag if ya want 308 Win ballistics.I am assuming the owners of the rifles CB is loading for didn`t realize a 300 Win kicks if she aint got a brake?
TG
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| Posted: Mon Oct 19th, 2009 12:25 AM |
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CB900F
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Timber;
It's like this: The kid found a local emporium that was selling the Browning A-bolts in stock for about $250.00 under their normal price. By the time he heard about it & got there with cash in hand, the choices were down to either a .300 Winchester magnum or a .270. And, of course, that's no choice at all; cream or dregs. He took the cream.
He wanted a .30-06, and .30-06 recoil, but they were long gone. So, the idea now is to give him a 180 grain bullet moving at .30-06 velocities, and then work up to the round's full potential in manageable stages. No sense in building in a flinch if we don't have to, ya know?
900F
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| Posted: Mon Oct 19th, 2009 12:38 AM |
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fishdog52
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My 2 cents agrees that this is one great way to introduce a young shooter and minimize the flinch. I am not particularly recoil sensitive, and don't want my grand kids to be. My 9 yr old grandson has been shooting a 270 with 130 gr bullets loaded to around 1900 fps for the last year or so, and his accuracy improving with his shooting. And, he's getting quite a bit of shooting in. Not much of a jump, when the time comes, to the same bullet & rifle, but at 3000 fps. But totally without fear.
Same thing with the 300 Mag.
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| Posted: Mon Oct 26th, 2009 08:12 PM |
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OKIE2
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Gotta ask,what is the use in owning a 300 Win Mag if ya want 308 Win ballistics.I am assuming the owners of the rifles CB is loading for didn`t realize a 300 Win kicks if she aint got a brake?
TG
I agree 300 mag is not for sissies. but you could cut the barrels to 16 inches so all the powder don't burn in the barrel.
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stevekoozer
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I just did a quick browse of the Lyman#'s 48 and 49 and Hornady's #7 the starting loads in both would be a good place to start and range from 2500 to 2700 ish in velocity. Just from looking at these 3 you are going to be burning about 5-8 grains more powder than an 06 when using the same powder like one of the 4350's or RL-19 and so on so you are going to get a touch more recoil from powder weight than an 06. The limiting factor is how it is perceived on the butt end, rifle weight and stock design in my mind are the biggest factors when talking recoil. I do not like to shoot browning bolt rifles as the stock design kills me in 30-06 and yet I can shoot my Rem 700 with pretty warm 180 grain loads all day off the bench with no problems. If it were me I would have him shooting it with both plugs and muffs as quieter rifles do kick less for a lot of people.
Best of luck to you
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