.300 WSM vs .284 Win, What is your experience?

Papa Charlie

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I have been shooting F-Class for several years with my .308 Win from 500-1000 yards. I have it well dialed in and it has performed very well. But looking to change it up. I am thinking about converting it to either .300 WSM or .284 Win.

If I move forward with the project, I will most likely use my Benchmark .308 barrel for practice and save the new Benchmark barrel (in what ever caliber) for matches only to preserve its life. Right now between practice and matches, I am running between 1300 and 1800 rounds down the pipe a year. The .308 is pretty barrel friendly, but these higher power, heavier rounds will not be as friendly.

First, before the comments begin, I understand that I won't be able to load my magazine, I can't do that now with length I load to so that is not a consideration.

Second, yes, I will have to change the bolt to a SA Magnum face. Not a problem as I have already found one that would be matched to the new barrel if I go with the .300 WSM.

Right now I use the Berger Juggernauts 185gr bullets with Varget, Lapua brass and CCI BR-2 primers.

I am wanting to increase the speed a little and the weight of the round to help in windy conditions. If I went with the .300 WSM I could easily go to a Berger 215gr Hybrid target or maybe even a 230gr but that may be a stretch. The .284 Win is faster and very accurate but generally you are still in the 180gr bullet weight range.

I have no personal experience with either one of these two rounds and was hoping that the very knowledgeable members here could provide me with their experiences.

Well, I think that is about it. Thank you all for your input in advance.
Patrick

 

FURMAN

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For pure accuracy in the wind the 300 WSM with 210s or 215s is king.


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djauofd

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Have a 284 win but it is built on a long action with a custom throat. So 180 VLDs and 183 SMK, load out at 3.430 which allows me to put more coal in the boiler room. Just based on a SA I would say 300 WSM.


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NorCal_In_AZ

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So I have only 25 round down my WSM so far, but here's what I found.

300WSM 64.5 grains of Superformance, got the 178 ELDX going at 2900fps. I was very impressed with that load. The only thing I didn't like was the case was not very full and it seemed like I was getting a lot of unburnt powder in the barrel. for my next 25 rounds I bought a pound of RL17. From what I've read it will get about the same velocity, but its a stick powder so my case is now fuller. I'm going to try 63 grains for these next rounds.

I also agree with rfurman, that the 200 class bullets will likely be even better in the wind.
 

Papa Charlie

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Thanks appreciate the input, kind of what I was thinking, but nice to get validation.

NorCal In AZ
One thing I have found with powders, sometime the stick are better at burning with the air space around them to get a clean burn. Another issue I have seen is when you have too much room in the case, the powder lays in the bottom side of the case and the fire will take the path of least resistance which is over the top of the majority of your powder.
I like my cases to be within 0.100 to 0.200 from the base of the bullet. There is sufficient air, the powder will lay well when on its side and I don't have to worry about packing my powder.
 

NorCal_In_AZ

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Thanks appreciate the input, kind of what I was thinking, but nice to get validation.

NorCal In AZ
One thing I have found with powders, sometime the stick are better at burning with the air space around them to get a clean burn. Another issue I have seen is when you have too much room in the case, the powder lays in the bottom side of the case and the fire will take the path of least resistance which is over the top of the majority of your powder.
I like my cases to be within 0.100 to 0.200 from the base of the bullet. There is sufficient air, the powder will lay well when on its side and I don't have to worry about packing my powder.

Yeah that is exactly what I think was happing. The velocity Superformance gives is awesome, but I think it would be better suited for larger bullets that eat up more room in the case.
 

elkguide

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I've gotten the best uniformity/velocity in my .300WSM's with WW760.
 

FURMAN

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If you really want to know go read on accurate shooter. As I already stated the 300 wins hands down with 210s and 215s period. H4350 is the powder. If you step outside that then you are just picking a cartridge and might as well flip a coin.


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djauofd

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Did do some quick load comparisons for 300 wn with 215 gr Hybrid target vs 284 win mag with 183 SMK. 284 win at 2850 give you 6.6 mill drop with 1.31 mil drift 10 mph cross wind. 300 win with same barrel length give you roughly 2,800 7.0 mill elevation , 1.3 mill drift. But do I got to a 197 SMK at 2748 FPS I get 6.8 mill elev 1.0 mill drift. But again it s a long action in the 284. Win so a very slight advantage 284.


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Papa Charlie

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refurman24
Thanks, I actually spend most of my time over on AS. But I find that I get a different perspective from the members here, which I find very valuable in making decisions.
 

FURMAN

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Did do some quick load comparisons for 300 wn with 215 gr Hybrid target vs 284 win mag with 183 SMK. 284 win at 2850 give you 6.6 mill drop with 1.31 mil drift 10 mph cross wind. 300 win with same barrel length give you roughly 2,800 7.0 mill elevation , 1.3 mill drift. But do I got to a 197 SMK at 2748 FPS I get 6.8 mill elev 1.0 mill drift. But again it s a long action in the 284. Win so a very slight advantage 284.


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Go see the number of records between the two. Ballistics on paper are a small part of the equation. Again 300 WSM with 210s or 215s hands down.


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Broz

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Did do some quick load comparisons for 300 wn with 215 gr Hybrid target vs 284 win mag with 183 SMK. 284 win at 2850 give you 6.6 mill drop with 1.31 mil drift 10 mph cross wind. 300 win with same barrel length give you roughly 2,800 7.0 mill elevation , 1.3 mill drift. But do I got to a 197 SMK at 2748 FPS I get 6.8 mill elev 1.0 mill drift. But again it s a long action in the 284. Win so a very slight advantage 284.


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You may want to do the 300 win mag at 2950 to 3000 with a 215. We see most rifle with H-1000 in this velocity with a 26". Faster with N-570. Last week I tested a 77 gr load of H-1000 with a 215 for a friend that was shooting well in a new CA Ridgeline 26" and is was solid 3015 fps and no pressure signs.

Jeff
 

Papa Charlie

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Well, sounds like the 300 WSM is going to be my new caliber.
Thanks very much for the help. When I get farther along, would love to hear what powders you recommend and loads.
Patrick
 

sapper299

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I have both of these and can say this:
300 WSM- the 230 grainers are great, but to get them up to speed where they perform the best is hard to do in the short case without beating on the shooter and beating up the brass. I switched to 208gr Hornadys and 215 Bergers with 4831sc and it shoots like a dream with a 30" barrel. Barrel life seems to be pretty good, i have 1100 down the tube and it still works great.

.284 Win- great round with the 180 Bergers or the 180 Hornady's and about 54.5 grains of 4831sc, CCI Br2. I was getting about 1200-1400 rounds out of a barrel (Bartlein and Brux) before it started to go south on me. I am not a fan of the torquing in the front rest I was getting from the fast twist barrels, but learned not to cheek the rifle so hard and it went away. I used Lapua 6.5x284 brass necked up, the Winchester brass required a lot of prep to get it on track. In the wind, it is a good round and maybe just a little more adjustment required than the .300 WSM.
 

djauofd

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I have both of these and can say this:
300 WSM- the 230 grainers are great, but to get them up to speed where they perform the best is hard to do in the short case without beating on the shooter and beating up the brass. I switched to 208gr Hornadys and 215 Bergers with 4831sc and it shoots like a dream with a 30" barrel. Barrel life seems to be pretty good, i have 1100 down the tube and it still works great.

.284 Win- great round with the 180 Bergers or the 180 Hornady's and about 54.5 grains of 4831sc, CCI Br2. I was getting about 1200-1400 rounds out of a barrel (Bartlein and Brux) before it started to go south on me. I am not a fan of the torquing in the front rest I was getting from the fast twist barrels, but learned not to cheek the rifle so hard and it went away. I used Lapua 6.5x284 brass necked up, the Winchester brass required a lot of prep to get it on track. In the wind, it is a good round and maybe just a little more adjustment required than the .300 WSM.

The above is why I like the 284 win. It’s less powder and less recoil. But either the 284 win or the 300 wsm are great rounds. Since ballistically they are so close it is only a matter of preference for what you prefer. Also what you save in powder, barrels, brass you can afford monolithic copper bullets. For example ALCO 168 gr Alum tips. At sea level the remain transonic out to 1,975 yds. I am not at this level of shooting, but you can. 180 +/- grain bullets go a long way for everyday shooting and hunting considerations. Love it. if I really want to lay down the hammer I have a 26” 338 Win Mag , which with modern day powders and bullets is plain crazy. Not a 338 Lapua but close enough for me laying out 338 300 gr bullets at 2,500 FPS


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Papa Charlie

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The thing I am looking for is wind control. Both the .300WSM and the .284Win are great calibers.

I was originally intending to convert to .284 but what I like about the .300WSM is the way it can handle the higher bullet weights. That would negate some of the effect of the wind on my rounds. At least this is my theory, I am looking to those that have used both for insight before making the investment.

I know that many have gone the way of the 6mm and 6.5mm, but again, that puts you into the lighter rounds and greater wind adjustments.

I don't hunt, this is for F-Class competition and the goal is all X's at 500 and 1000 yards. I am not a small man so the recoil is not a concern.
 
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NorCal_In_AZ

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My 300WSM kicks only a little bit more than my .308. If I went with heavier parts it would be almost the same.

 

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