.300WSM Recipe's???

[victor]

Hi All,

Just received a new rifle in .300WSM, Borden Alpine Action, Rock Creek 5R, #3 barrel, H-S Precision stock. Total weight 8.75 lbs. This is my walking longrange hunting rifle.

I am heading to WY for elk this season. I need to develop a load by mid Sept. My preference is to shoot 180gr Accubonds or TSX at a speed of 3,000 fps.

I'm just starting out with load development. The tightest consistent group I currently have is .56" using MRP-69.0gr & 180 A-Max moly coated (right at 3,000fps). The only other powder I've tried is H4350 and I think the MRP shows more promise at this time. Oh & primers used were BR2, 210M & 215M.

The 180 Accubonds and 180 TSX seem to put 2 bullets touching and one of the 3 seems to stray from formation.

I'm not too keen on using the A-max for Elk. Anybody have any pet recipe's they would be willing to share?

Looking forward to your knowledge base,
Kind regards,
Vic

 

[ackleyfan]

300 wsm?

Victor, how many will it hold in the magazine? any pics of your rifle? thanks, AF

 

[wildcat]

Victor, your rifle sounds awesome. I have some brand new 300 WSM Norma brass if you want them. I have about 198 pieces. I was going to build a 300WSM project, however, I switched to a 6x284 instead. If you want them, I will give you a good deal.

If you want them, e-mail me at; [email protected]. If anybody else wants them, let me too. I will give Victor, first shot.

Jake

 

[victor]

Ackely,

I think the rifle holds 3 in the magazine, but have not confirmed that yet. I have been busy with load developement. I only intend to require one shot to bag anything. HA

Pics will be coming, as soon as I have some time to upload.

Wildcat, yes I am interested in the brass, sent you an e-mail.

Take care,
Vic

 

[ackleyfan]

300 wsm

Victor ,I look forward to pics I have an Alpine mag and a #3 Rock ,9" Twist 7mm that is getting ready for the smith just waiting on the Mcm stock It will be a 7 wsm I look forward to your progress!

 

[WAMBO]

My 300 WSM

I have a Win M70 with a Obermeyer 25" fluted #5 barrel w/ Vais brake bedded in a McMillan sporter stock that was built by Mike Bryant and it weighs 9lbs with scope.
I haven't put but 100 rds thru it but it likes the 180 NBT with 60grs of AA4350, velocity is 2968fps and will put 3 into 1.5" at 300yds and wacks a 10"x13" steel target sub moa precision consistently at 600yds shooting off a backpack and a beanbag on the rear.
This should prove adequate for the coues whitetail hunt this year but for elk I hope the 180 Accubonds shoot this good as that would be my go to load as soon as I get a chance to try them.
I think the NBT would hold up better than the A-max but I too would be leery of using them for elk.
Wayne aka WAMBO

 

[victor]

Hey Wambo,

What is AA4350, Not familiar with it. Is it a Winchester powder?

From past experience of switching out Accubonds and Balistic Tips, I see no difference in my .270Wby. Both bullets have same point of impact, so odds are good that you will have luck with the accubonds.

I used up the last of my 180 Accubonds the other day but got a real good group with the last batch. I first used Norma Brass, 210M primers, MRP-69.0, & 180AB and got a 3/4" 3 shot group (100yds). Then I adjusted it a little - MRP-68.8, 180AB, 215M primer, and it shrunk my group to 3/8". When I get my next batch of bullets I will have to repeat that load and chornagraph it. The load with 69.0gr of MRP clocked at 2,989, 3,006 & 3,011 FPS.

By the way, I have found that Norma brass has thicker necks than the Winchester. I use a .336 neck bushing. It squeezes the neck just fine on the Norma, but the Win brass seems to go thru without any force at all. There is definitely a difference.

One other observation I made was that after firing, something happens to the shoulder where it binds the bolt when I reinsert the empty fired brass in the chamber. I have to use a body die to bump that shoulder back just a tiny bit. The brass goes into the body die without force, but right at the very end, it stops the ram. I could see about a .005 gap between the shell holder and the body die. I then have to put substantail force on the lever to force the brass up into the die. After that operation, the brass cycles into the chamber with ease.

I normaly reload Wby loads and I have never had such a situation like this before. With Weatherby's It's the blasted belted rim that always expanded and the primer pockets opened up really fast and shortened case life to about 6 reloads or less. I went to a beltless cartridge to get away from the Wby problems, but it seems every cartridge has its quirks. Do you find that you have to full length resize your 300WSM brass?

Ok got run and finish reloading,
Vic

 

[WAMBO]

victor,

AA4350 is an Accurate Arms powder, I bought 24 lbs of it awhile ago when Widners had it for $80 for an 8# jug.

Thanks for the good news about the Accubonds, I hope I have the same experience.

Sounds like you've found a good load with the Accubonds, hopefully the next lot of the Accubonds will be close to the lot you were using.


I haven't had to resize any brass yet as I bought 300 pcs new and have only gone thru about 100, I'm using Win brass.

Last Saturday I went out and shot some surplus WC852 and the Hornady 178 A-max at 100yds off the bench, 3 shots went into 2 holes that were .300" CTC.
I've been shooting this load a little for practice as it's less expensive to load, it also shoots good to 600yds which is the farthest I shot the rifle at.

Keep us posted,
Wayne aka WAMBO

 

[tjbill]

I am working up loads for my Kimber Montana in 300 WSM for an elk hunt in Idaho. So far I have had good luck with H4831SC, Win brass, Fed 215's, and 168gr Barnes TSX. I have shot groups from .25 to .75 using the sandbag/Toyota rest. One group actually measured .150, but I haven't shot the gun enough to even consider that anything other than an anomoly. The rifle is extremely light and takes a lot of work to get good holds, but the TSX's seem to be very accurate.

 

[Guy M]

Good info here guys! I just bought a lightly used .300 WSM, Win 70 "coyote" and haven't started loading for it yet. I know the previous owner and have seen the rifle in action at 600 yards, where it does real well. He was using Norma brass and 190 grain Bergers. I don't have his load data on hand right now, but am looking forward to working with this rifle. Want to use this as my open-country mulie rifle, here in central & eastern Washington.

Because I've had several .300 magnums, a .300 RUM, as well as .308's and a .30-06 I've got quite a stock of .30 cal bullets on hand, mostly Nosler & Sierra, from 155 - 200 grains.

Thanks for the good info, and looking forward to seeing more good .300 WSM loads.

Regards, Guy

 

[Geezer]

One other observation I made was that after firing, something happens to the shoulder where it binds the bolt when I reinsert the empty fired brass in the chamber. I have to use a body die to bump that shoulder back just a tiny bit. The brass goes into the body die without force, but right at the very end, it stops the ram. I could see about a .005 gap between the shell holder and the body die. I then have to put substantail force on the lever to force the brass up into the die. After that operation, the brass cycles into the chamber with ease.

I normaly reload Wby loads and I have never had such a situation like this before. With Weatherby's It's the blasted belted rim that always expanded and the primer pockets opened up really fast and shortened case life to about 6 reloads or less. I went to a beltless cartridge to get away from the Wby problems, but it seems every cartridge has its quirks. Do you find that you have to full length resize your 300WSM brass?

Ok got run and finish reloading,
Vic

This made me run downstairs to make sure my just fired Norma brass will cycle through my Savage 16FLSS in 300WSM. Not a problem. After initial full-length resizing and trim, I've just neck sized and trimmed for length, and even the cases on their 5th cycle of reasonably heavy loads chamber and extract easily and have good neck tension. Switching from Winchester to Norma brass also shrunk my 100yd groups by .25" with no other load changes.

 

[SamSpade]

Tried the new IMR 4007ssc powder today with great results in 300WSM. The best powder that I used prior to this was WXR shooting the 180 SMK. They discontinued WXR so I had to find another powder. H380, H414 and IMR4831 wouldn't shoot under an inch, H4350 was okay but not what I wanted. Then I saw that the IMR4007 had loading data for 300WSM. It uses on average 10 grains less powder then the rest and only fills the case to the start of the shoulder but still obtains the same velocity. Recoil was reduced enough to be noticeable too! Started at 57, 58, 59, 59.5 and finally 60 grains and all groups were like this!!

 

[steve4102]

Thanks Sam, I picked up a jug of 4007 just the other day to try in my 300WSM. I hope my rifles like it as much as yours.

 

[SamSpade]

Thanks Sam, I picked up a jug of 4007 just the other day to try in my 300WSM. I hope my rifles like it as much as yours.

I was actually shooting two rifles, both Remingtons, one with a heavy factory rechambered and recrowned, the other a Lilja sporter with a brake. Both rifles shot about the same groups. Neither rifle showed signs of excessive pressure at the 60 grain load.

Like to add that I was using Federal 215M primers.