350 RM and RL-15

Mort

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Between the Handloading, Shooting, and Hunting forums, I have heard quite a bit about loading the 350 Rem Mag with RL-15. None of my manuals have data for RL-15. I guess I could just buy more manuals (never a bad option), but you guys seem a good source.

Anyone care to share some load data (starting) for the 350 RM in a Rem 600? I'm particularly interested in the Barnes 225 TSX, as I've had good results with them and RL-7. But I'm always interested in something better.

Mort
 

Paul H

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While I can't give a 100% recomendation, the 350 rem mag has nearly the same case capacity as the 35 whelen, and hence 35 whelen is a good source of data. That said, work up carefully.

I've used Varget with my 350 and 225 sierras, and find 59 gr to be a fine load. RL-15 should be in the same ballpark.
 

Float Pilot

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I just bought some Varget, RL-15 and BLC-(2) for the 350 Rem Mag.
I ran out of money before I could buy some WW-748 as well.

I found some loads for RL-15 but they seem pretty hot,,, well at least a lot of powder.... like up to 63 grains for a 225 grain Seirra bota tail

I will let you know how it works out.

I went through and looked at all the powders that should work in the 350 Rem Mag. (The original short action magnum)

Varget
RL-15
WW-748
H-335
IMR-4895
IMR-4320
IMR-4064
BL-C(2)
H-4895
IMR-3031

All I currently have for primers is a filing cabinet drawer full of CCI mag and non-mag primers from back when Pay-Less went belly up years ago.
I must have three thousand left over...
I probably need to by some other primers just to see what difference it makes. Some folks get pretty attached to certain type (brands) of primers.
 

Paul H

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I remember that pay-less sale, I still have a few boxes of .308 ammo from it.

I can't comment one way or the other on which primers are best, as there is only so much load testing I'm willing to do. Way beck when I started handloading I was trying everything in my .308, and compared CCI 300's to Fed 210's, and the feds showed a slight accuracy edge. Since then I've used Fed 210's exclusive for hunting loads burning 70 gr or less of powder and have yet to complain.

I did do one interesting primer test a few years back. I still have quite a few CCI 300's I got on sale and generally use for plinking cast loads. Well, traded into a Lyman 3589 mold, this casts a .358" 280 gr rn mold that is sadly discontinued, but a flawless performer in most every 35 caliber rifle. Anyhow, I just had to try some loads in my 350 Rigby, and after researching what the whelen folks were doing, tried to emulate them.

What the whelen folks have found is 40 gr RL 15 produces good accuracy at around 2000 fps, though note this is a reduced load. Well, I figured I'd start at 40 gr and work up. Turned out 44 gr was the magic load, and I shot my best ever cast bullet load, 5 shots into 1" at 100 yds. I was so excited I loaded up a full box to confirm the load next time at the range. Well low and behold I had worked up the load in the fall, and next time out was early winter. The temp had dropped some 20 degrees, just enough so that my magic load would hangfire, every shot.

This was no good, so I elected to try the same powder charge with every large primer I had, CCI 300, CCI 350, Fed 210 and Fed 215. You guessed all the other primers flawlessly ignited the loads, but groups were 2-3" for 5 shots, and the CCI 300's still hangfired.

I did prove to my satisfaction that the CCI 300 is a "cooler" primer than the fed 210's, but also my results show that doesn't equate to better or worse accuracy. It does prove the primer can have an effect, and that effect isn't the same from cartridge to cartridge, powder to powder, or even the same powder in the same cartridge with different bullets.

Thanks for that link, I didn't look too deep into the page, but I wonder if that is Ted in the Yukon? He's a big fan of the 35.
 

Float Pilot

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That is interesting.
I never have had a CCI primer not work.

I wonder if it was an old tray of primers that may have been near some oil or gun solvent?

I have a few from the 1970s.... but most of those are pistol primers along with those old cans of Herco and Unique that say 1974 on the cans...
Those were stored for years in a big 40mm ammo can. Maybe it would be ok for a bunch of light loads in 45 colt and 44 mag. I just can't bring myself to toss it yet....


I think I will look around for some newer primers. I tried to explain what I needed to my son over the phone, but he gets distracted within seconds...He is back from Iraq and all the gals have his attention....short as it is...


xx
 

alaska bush man

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350 Rm

350 Rm

The powder that I have used in 338-06, 358 Win and 350 RM and 35 Whel is

IMR 4320
 

Paul H

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It wasn't that the CCI's didn't work, it's just I was using such a mild load that they weren't hot enough to reliably spark off the load. Generally running a case 2/3 full of rifle powder can lead to less than desireable results, and that's what I got. Don't take that as a criticism of the CCI's, I was just using a bad combination.
 

Mort

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Thanks

Thanks

Now see, that's why I came to you guys! Thanks for all the inputs. Great links Float Pilot.

Mort
 

Float Pilot

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I have some Federal 215s coming down the hwy today and a can of WW-748. (for comparison)
So I can see happens with different primers too. The Winchester WLRs are supposedly the hottest primers, but I have not found any of those yet. Just my bizzillion CCI primers both mag and standard and 4 boxes of Fed 215s.

My powder scale is starting to have a hang-up point. I wonder if it was whacked around somehow...

xx
 

alaska bush man

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Case Capacity

Case Capacity

Over the years the more space you fill up in the case the better the performance.....within pressure limit of course!
 

alaska bush man

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Primers

Primers

It seems in my 350 mag the Fed 215GM or WLRM primers are the way to go!

I guess the Rem Mag primer would also work since it is a Rem round!

The WLRM seems to be hottiest primer.........

Reloder 15 is good powder also!
 

Float Pilot

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I would love to report how my 350 rem Mag loads are doing..... but... the supposedly 3 or 4 day trip to the Smith for front sight installation has turned into a two month ordeal.....
 

alaska bush man

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35 Whel Loads

35 Whel Loads

57.5 IMR 4895
Hornady 250 RN (#3525)
COAL 3.240
no crimp
2464, 2460, 2430, 2378, 2431fps,
----ft.lbs
LR primer - prob. CCI 200 (?)
- a bit over classic Whelen velocities
- 1 3/8" 3 shot group
- feeds great!


56/IMR 4064
Hornady 250 SP
(#3520)
COAL 3.250
no crimp
2364, 2359, 2372, 2358, 2376, 2368, 2354, 2375, 2381, 2359fps,
fairly consistent
----ft.lbs
OK pressure
1 1/8" 3 shot group



54/AA2015br
Hornady 250 SP
(#3520)
COAL 3.280
CCI 200
2562, 2547, 2539, 2551, 2547, 2543fps
3610 ft.lbs.
RP 30-06 brass
consistent - max hunting load
53/AA2015br gave 2489, 2501, 2507fps


65/ReL15
Hornady 250 SP
(#3520)
COAL 3.370
WLR
2665,2650,2642fps
3934 ft.lbs.
- consider as over max load
RP 35 Whelen brass
consistent - max hunting load
slight extractor groove imprint
cut tip off to fit magazine as required
63.5/ReL15/2572
64 ReL/2567
65.6/ReL15/2674,2666


66/ReL15
Hornady 250 RN
(#3525)
COAL 3.280
primers ? probably CCI 200
2609fps
---- ft.lbs.
- consider as over max load
RP 35 Whelen brass
no excess pressure


64/ReL15
250 Speer hotcore
COAL 3.400
primers ? probably CCI 200
2592fps
---- ft.lbs.
- consider as over max loadRP 35 Whelen brass
no excess pressure
cut tip back (to 3.280) to fit magazine as required


53/IMR 3031
Hornady 250 SP
(#3520)
COAL 3.250
no crimp
2385,2407fps,
consistent
----ft.lbs
51.5/IMR3031/2303fps
52/IMR3031/2354fps


Remington
Factory
R35WH2
250 grain Soft Point RN
2280, 2232, 2333, 2276fps
a bit pedestrian in my 20" Shilen barreled rifle
 

Murphy

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RL-15 loads

RL-15 loads

Between the Handloading, Shooting, and Hunting forums, I have heard quite a bit about loading the 350 Rem Mag with RL-15. None of my manuals have data for RL-15. I guess I could just buy more manuals (never a bad option), but you guys seem a good source.

Anyone care to share some load data (starting) for the 350 RM in a Rem 600? I'm particularly interested in the Barnes 225 TSX, as I've had good results with them and RL-7. But I'm always interested in something better.

Mort

Mort,

RL-15 powder is a little slow for the 350 RM except for the 250 grain bullets. It does work and is a good powder but you just fill the case with it and seat a bullet. 62.0 grains is enough to get the 250's to 2500 fps, a little less in the short tube of the m600. Varget is almost identical to it in performance, grain for grain. Varget will peak quickly so start low. You're using RL-7 and that is a little fast and a max load will leave space in the case. If you can find RL-12 it is probably the best of the RL's but has been discontinued now. It will load 2 grains less than 15 and produce same velocity. Probably the best powder all around is H4895. It and IMR are about the same burning rate but the new Hodgdons is more consistant and less temperature sensitive. I think manuals list loads for 4895. From memory I would say 60 grains of H4895 and a 225 grain bullet will give about 2600 fps.

Also the 350 is one magnum that I don't use magnum primers in. They sometimes cause varying velocities. The capacity is equal to the 30-06 and we don't use magnum primers for it especially for mid-burnig rate powders.

I have been using this same group of powders lately to develop loads for the 416-WSM, also known as the 416 Alaska Express. RL-15, RL-12, H4895 & Varget. These powders are very predictable and dependable. This caliber has an expansion ratio similar to the 350 Mag. The WSM case holds 70 grains of RL-15 to the base of the neck with slight compression. That's a perfect charge and sends 350 grains at 2400 fps for 4500 ft/lbs of energy. A very efficient package.
 

Mort

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Good excuse to experiment

Good excuse to experiment

Thanks Murphy. I'll have to give the H4895 a shot. I've kind of settled on the 225 TSX for now, but may have to expand my bullet selection too.
 

Float Pilot

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I have a BUNCH of loads ready to go.

So I drove up to Kenai the other day and visited my 350 Rem Mag in the shop where I left it for a front sight... Back around the end of Sept I think... STILL NOT DONE....

Talk about depressing....
 

alaska bush man

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350 Mag data

350 Mag data

350 REMINGTON MAGNUM
REMINGTON Model 600 - 18 1/2" barrel

-
This compact shooter weighs in at only 6 1/2 lbs
I really like this little "Maggie".
It's fun to shoot.


59.5/ReL15
250 Hornady RN
- (new interlock)
- ogive slightly down in case mouth
- light taper crimp
2.820" COAL just fits 600 magazine
2479,2461,2498fps
----ft.lbs
WLRM,
-pressures OK
-feeds very well
very slightly FASTER than my longer barrel M660 above (why - ???)


60/ReL15
- Lee 4.3cc dipped and left rounded
250 Speer Hot Core
2.815"
???? fps
----ft.lbs
WLRM,
- accurate
- 3 shots into 1"
- good load for all my 350RMs
- this 600 is scope sighted in for this load

REMINGTON M600/350 REM. MAG. - 18 1/2" barrel
See Shooting Times (July 1989) - Author's Notes say that these are maximum in author's gun but may be excessive for others - reduce by 10% to start in other guns
These loads not warranted safe in any other rifles - read disclaimer above


58/H4895
200 Rem SP C-L
Rem 9 1/2
2650fps
- average of 5 shots clocked 12' from muzzle
Rem brass


53/H4895
250 Speer Spitzer
Rem 9 1/2
2477fps
- average of 5 shots clocked 12' from muzzle
Rem brass
 
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