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#2796608 - 02/07/09 05:57 PM RL 17 / 300 WSM Load Results...
Brad Offline
Campfire Kahuna

Registered: 10/31/00
Posts: 21780
 Originally Posted By: sdgunslinger
With one of the first nice days of the winter.....in the upper thirties and a lack of howling winds, I was able to get out and fire a few shots over the pro-chrono . FWIW to anyone.......

The gun is a M-70 classic stainless 300 wsm, once fired W-W cases and regular strength WW primers . 180 gr. Nosler ballistics seated to 2.9 inch OAL . None of the shots showed primer flattening or heavy bolt lift .


62.5 gr. 2890 fps

64.0 gr. 3003 fps

65.0 gr . 3062 fps


Well, obviously we've all started to hear a bit of the RL17 BUZZ, and I've been curious about it for some time.

Since I've known SD on this and another forum for a good long time, and I know he's an honest reporter and a guy that doesn't red-line, his RL17 post sparked something in me to try and locate some of the stuff... as luck would have it, one stop at Yellowstone Gateways Sports and I had a pound (they got their first shipment yesterday!).

I'm totally under the weather with a cold, but since I found out my 300 WSM has a potential liking for the 200 gr Partition, and since it was a drop-dead beautiful, warm, and windless day, I decided to ignore my cold and work up some loads based on SD's post and the Alliant website.

I took the Kimber MT and went up to our property in the Shields Valley this evening (the nearly full moon was just rising over the Crazy Mountains). I set up the chrono and bench and hunkered down for some shooting.

200 gr. Nosler Partition / WW Bras / Fed 210 Primers / Seated .030" off lands:

62.0 = 2,858
62.5 = 2,861

By comparison, 61.5 gr's of H4350 gives 2,801 fps in this rifle.

180 gr. Nosler Partition / WW Bras / Fed 210 primers / Seated .030" off lands:

64.5 = 3,037 fps
65.0 = 3,067 fps

By comparison, 63.5 gr's of H4350 gives 2,954 fps in this rifle.

All loads gave similar (easy) bolt lift as my H4350 loads (which are .5 gr's below Hodgdon's MAX loads).

With the 200's I'd go with the 62.0 gr load... it gives exactly the same .9" accuracy that H4350 has given and obviously going .5 gr higher yielded very little velocity gain which leads me to believe the 62.0 gr load is MAX in my rifle.

With the 180's I'd be comfortable with either 64.5 or 65.0 gr's... since I'm conservative by nature, I'd go with the 64.5 gr load just to keep everything nice and easy.

This particular Kimber dotes on 168 TSX's and now (apparently) 200 partitions, but absolutely doesn't like any 180 grain bullet I've tried in it (go figure!). The 64.5 gr/RL 17 load turned in a 1.25" group (which is totally acceptable) but this rifle shoots much better and more consistently with heavier and lighter bullets.

So, at first blush I'd absolutely give Alliant credit that, at least with the 300 WSM cartridge, the hype appears to be true. Obviously more testing is warranted but, so far, I'd cautiously say RL17 is a real winner, giving identical accuracy as H4350, but a fair bit more velocity.

BTW, a word of caution, Alliant's site lists 66.0 gr's with a 180 Speer (300 WSM)... that would be over MAX in my rifle.

_________________________


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#2796646 - 02/07/09 06:09 PM Re: RL 17 / 300 WSM Load Results... [Re: Brad]
Mark R Dobrenski Offline
Campfire Oracle

Registered: 04/19/01
Posts: 28277
Loc: Bozeman, Montana
Mac, thx for the report.

Next up, I'd encourage you to take 3 case with your 200 load and 3 with your 180 load and keep loading em up and firing them. See how many times you can load them b4 the primer pockets get too loose. 4 me this would be quite telling as to how much was too much.

Just a thunk

Dober
_________________________
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy

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#2796700 - 02/07/09 06:27 PM Re: RL 17 / 300 WSM Load Results... [Re: Brad]
SamOlson Offline
Campfire Kahuna

Registered: 02/01/06
Posts: 20830
Interesting Brad, thanks for sharing the info.

3050+ is cruising right along for the little fatty!
_________________________
These are the Good Ol' Days

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#2796759 - 02/07/09 06:55 PM Re: RL 17 / 300 WSM Load Results... [Re: Brad]
SU35 Offline
Campfire 'Bwana

Registered: 08/13/02
Posts: 11760
Loc: Yavapai County
Pretty cool huh Brad.

What's your ES?


Your results pretty much line up with mine.

 Quote:

65 grains of RL17 for 3,060.

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#2797483 - 02/08/09 06:39 AM Re: RL 17 / 300 WSM Load Results... [Re: SU35]
sdgunslinger Offline
Campfire Ranger

Registered: 02/27/01
Posts: 1734
Loc: Gary , SD USA
And near identical results with my M-70......


Hello WSM , goodbye 300 Winchester (grin)

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#2797568 - 02/08/09 07:30 AM Re: RL 17 / 300 WSM Load Results... [Re: sdgunslinger]
Rancho_Loco Offline
Campfire Kahuna

Registered: 12/06/04
Posts: 16060
Loc: MONTANA
Hmmmm... Just when I thought I was done with my 7mm saum...
_________________________
Originally Posted By: safariman

I have not seen a SINGLE post (by) Take A Knee that looked or sounded like him being a blowhard or self appointed expert.

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#2798507 - 02/08/09 02:46 PM Re: RL 17 / 300 WSM Load Results... [Re: sdgunslinger]
Mark R Dobrenski Offline
Campfire Oracle

Registered: 04/19/01
Posts: 28277
Loc: Bozeman, Montana
Could be wrong here but, I'd be for betting if it's doing some wonder work with the WSM (with good case life, the one thing to date not spoken of or worked thru) then I'd be for betting it'll do the same thing for the 300 Win.

One way or another there will still be the speed diff between the two is my opinion.

Dober
_________________________
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy

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#2798513 - 02/08/09 02:47 PM Re: RL 17 / 300 WSM Load Results... [Re: Rancho_Loco]
Mark R Dobrenski Offline
Campfire Oracle

Registered: 04/19/01
Posts: 28277
Loc: Bozeman, Montana
Rancho-that is one cool lil rig, don't give up on her yet. Now once you see my redone G33/270 then you can begin to give up on her...grin

Dober
_________________________
"True respect starts with the way you treat others, and it is earned over a lifetime of demonstrating kindness, honor and dignity"....Tony Dungy

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#2798524 - 02/08/09 02:50 PM Re: RL 17 / 300 WSM Load Results... [Re: Mark R Dobrenski]
Rancho_Loco Offline
Campfire Kahuna

Registered: 12/06/04
Posts: 16060
Loc: MONTANA
Nah - I'm not giving up on it, just thought I was close to finding a load. I was liking Magpro, but now Gateway has RL 17 for me to mess around with...
_________________________
Originally Posted By: safariman

I have not seen a SINGLE post (by) Take A Knee that looked or sounded like him being a blowhard or self appointed expert.

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#2798531 - 02/08/09 02:54 PM Re: RL 17 / 300 WSM Load Results... [Re: Rancho_Loco]
SamOlson Offline
Campfire Kahuna

Registered: 02/01/06
Posts: 20830
I read somewhere that '17 is dirty...
_________________________
These are the Good Ol' Days

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