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1/18/2006 10:42:43 AM EDT
could you give your 2 cents...I'm buying a flat top ar to use for varmint hunting and punching paper at the range.  I demand accuracy from all my rifles so i guess thats most important to me.  I'm looking at a olympic arms 16 inch bull barrel and a bushmaster 24 inch varminter.  my current rock river A2nm (8 twist) shoots the heavy bullets very well and I would like to use 69-80 gr bullets in my varmint rifle.  oh well i could go on and on...lets see what u think
1/18/2006 11:27:41 AM EDT
[#1]
I'm also trying to build a flat top and I decided on a 20" SS match barrel for my current project but I'm only going to build the upper for now, the lower will be built later on.

A 24" would be nice too but it depends if you can tolerate the extra weight.

Check out ADCO, they sell RRA varmint and other great performing barrels.


ADCO Firearms website link
1/18/2006 12:16:24 PM EDT
[#2]
The Bushmaster is a very good rifle, and would more than likely meet your needs. I do think that the 24" barrel means that the rifle is limited.

If it were me I would go with a shorter barrel(18"-20") in stainless for a dedicated target/varmint rifle. I prefer a shorter barrel only because I don't see a huge advantage in the velocity gain of the 24", but I do think there is an advantage in the mobility and accuracy of a 18" or 20" SS barrel.
1/18/2006 2:41:49 PM EDT
[#3]
thanks for the tip about ADCO they have some nice stuff.  Anyone use the 1:9 twist for the heavy bullets?  I have a 1:8 twist now and works fine.  I really want to use the 75 gr. A-max I hear its awsome.  What about chambers?  My rock river has a wylde chamber and feeds anything.  Any pro or con to olympic or bushy?  Sorry about taking so long to reply.  I have been reloading a had a stuck case.  I used the remover and then got another stuck case 3 later   Got online and ordered some redding dies ive had it with rcbs!
1/18/2006 4:31:09 PM EDT
[#4]
I had no problems shooting 77gr blackhills ammo out of a Bushy 1:9 twist barrel, but it doesn't work for everyone. If you plan on the heavy bullets, I would stick with the 1:7 or 1:8 twist barrels. I prefer 1:7 because they can handle 55-80gr bullets with no problem. I would also go with the Wilde chamber for its versatility.
1/18/2006 6:28:21 PM EDT
[#5]
Adco's Designated Marksman M4 upper is 16" mid-length 1:8 SS barrel upper.  That would do the trick...

TS
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