These are very interesting camberings and a great option for many but there are issues. They are ok as soon as you know what they are:
- With good care and reloading techniques the WSSM cases are extremely durable. I know some folks did a torture testing and were able to reload the same piece of brass 30 times even shooting with AR.
- The rounds are very powerful. The claims of speed records and power records over .308 and .30-06 have some foundation but when compared with average .308 and .30-06 loads. Those can be pumped up too.
In any case the OSSM loads that claim those speeds are not accurate. The barrel density in an AR platform doesn't allow for those type of excesses.
I would be more worry about finding a nice milder and more accurate load than getting any new record.
- There is one more option that is not listed below that is the 30-25WSSM. it is nothing but the .25 WSSM necked up to .30. The advantage is that this uppers are a tad more accurate and can shoot both the OSSM and the 30-25 WSSM loads. The OSSM cannot shoot the 30-25loads.
- Some folks get many feed issues but some others don't. Do not be surprised if you get them but they can be fixed.
- Potentially the WSSM extra raw power could be put to good use if it wasn't because there is no way to seat the best bullets w/o running into COAL issues. Because the best bullets cannot be used this presents serious limitations where the extra energy at long range could be used. In the end we do not need to kill the deer twice at shorter ranges.
Check all the ballistics charts before you decide if you want to take long shots. The information is out there.
- Folks with a lot of experience are having trouble getting the uppers to produce MOA accuracy. Sub-moa can be achieve but it is not excellent.
It is not an issue for the average hunter at 100-300 yards but at longer ranges it becomes a bigger issues, with some exceptions.
- While some folks are happy with the OSSM many folks are not so happy and the ones that used the 30-25 WSSM are getting better results than the game stalker anyway.
- While the 6.8SPC is a great option for 100 to 300yards then it suffers some of the same issues of the big bore low grain combination. It is a great option for most folks but if you have to take long shots consider other options. look at the ballistic charts and then decide.
The AR-15 was originally designed for the .223 round and not the other way around. While we enjoy many great options for this systems we need to understand the physical limitations of it.
My comments here are not to degrade or critizice any options. I put them here after long research and to the best of my knowledge so others can use this if they want. Do not take anything to hearht. What works for me might not works for others based on different needs, likes of dislikes.
I am currently working on this thread to see if we can come up with a good long range option in WSSM but we have been hitting the wall with both accuracy and poor bullet selection due to the physical limitations of the AR-15 magazines and the maximum length allowed for good bullets to fit in them.
http://www.oa2.org/forums/viewtopic.php?t=9155&
One somebody says I have the most powerful round ever think..... sometimes less is more in the end.
I hope this helps.
Cheers,
E.