What To Build Next

[lasher]

i had decided i did not need anymore rifles on AR designs. then Aero came out with the woodland monthly/limited one time run of uppers/lowers/handguard in woodland camo cerecoat (hope i spelled that finish correctly) and i just finished building an 18" 308 out of that batch. last month they had another finish i liked as well, but i resisted, they took the new product they did not sell and offered them as blemished build kits, they are not blems but new unblemished that didn't sell. sooooo,,,i bought a small frame ar15 magazine size kit. i get dealer pricing so got it for 100 bucks less than advertised "blem" price.

now i need to determine what caliber to build, i have 3-5.56, 2-7.65x39, 6-6.8spcII, and 3-308. i will not build a blackout or grendel, i require a muzzle velocity of 2700fps minimum, and may have to jump into wildcat country,,,don't really know if i want to do that. any suggestions on a standard caliber?

 

[D. Hargrove]

.243 WSSM is a screamer. @dennishoddy has one and all but talked me into making one myself. Just waiting on the winter months and it will get done.
Ballistic performance
Bullet mass/type Velocity Energy
58 gr (4 g) VMax 4,068 ft/s (1,240 m/s) 2,132 ft·lbf (2,891 J)
70 gr (5 g) BT 3,707 ft/s (1,130 m/s) 2,136 ft·lbf (2,896 J)
80 gr (5 g) BTSP 3,545 ft/s (1,081 m/s) 2,233 ft·lbf (3,028 J)
90 gr (6 g) SFT 3,280 ft/s (1,000 m/s) 2,151 ft·lbf (2,916 J)
100 gr (6 g) BTSP 3,136 ft/s (956 m/s) 2,184 ft·lbf (2,961

 

[lasher]

who makes barrels and bolts for that?

 

[D. Hargrove]

who makes barrels and bolts for that?

I believe olympic arms. Dennis would be a better guy to get details from. The round is certainly fast though!

 

[lasher]

thanks

 

[dennishoddy]

i had decided i did not need anymore rifles on AR designs. then Aero came out with the woodland monthly/limited one time run of uppers/lowers/handguard in woodland camo cerecoat (hope i spelled that finish correctly) and i just finished building an 18" 308 out of that batch. last month they had another finish i liked as well, but i resisted, they took the new product they did not sell and offered them as blemished build kits, they are not blems but new unblemished that didn't sell. sooooo,,,i bought a small frame ar15 magazine size kit. i get dealer pricing so got it for 100 bucks less than advertised "blem" price.

now i need to determine what caliber to build, i have 3-5.56, 2-7.65x39, 6-6.8spcII, and 3-308. i will not build a blackout or grendel, i require a muzzle velocity of 2700fps minimum, and may have to jump into wildcat country,,,don't really know if i want to do that. any suggestions on a standard caliber?

I'm in your same boat. I posted a thread here awhile back about a new upper to build and just haven't found what I was looking for that I already didn't have that would cover those bases.
I subscribe to the FireArms Blog, and they had a new wildcat for the AR-15 platform that caught my eye.
.400 AR, shoots .40 grain/10mm bullets in a magazine that will allow double stack that fit the AR-15 mag well using a standard AR bolt.
Based on the 7.35X51mm case that is trimmed right below the neck giving a 1.7" case. This case uses the 7.62X39mm or 6.5mm Grendel bolts. It is a tapered case, not straight walled.
200 grain MZ bullets in .40 cal to hit 2312fps.
.40 cal hand gun bullets of 135 grain were travelling at 3042fps.
Not bad.

 

[dennishoddy]

I believe olympic arms. Dennis would be a better guy to get details from. The round is certainly fast though!

If I remember correctly Olympic arms went belly up a short time ago, or shortly will. Just working off memory for that info.

 

[undeg01]

Check out Dedicated Technology. http://www.dtechuppers.com/

I built a 6mm DTI. It fits the AR 15 platform but can almost reach 243 Win ballistics. You have to reload, starting with a 6.8 SPC case necked down to 6mm. Mike has a deal with Hornady so you can get the dies from him with your order.

I have been completely satisfied with mine. Once I got the load dialed in, I have shot a 5 shot group at 100 yds measuring .184". It is a flat shooting round that I have taken varmints, coyotes and deer with.

If you will PM me with your email address, I can send you the reload charts so you get an idea of what you can get.

 

[dennishoddy]

.243 WSSM is a screamer. @dennishoddy has one and all but talked me into making one myself. Just waiting on the winter months and it will get done.
Ballistic performance
Bullet mass/type Velocity Energy
58 gr (4 g) VMax 4,068 ft/s (1,240 m/s) 2,132 ft·lbf (2,891 J)
70 gr (5 g) BT 3,707 ft/s (1,130 m/s) 2,136 ft·lbf (2,896 J)
80 gr (5 g) BTSP 3,545 ft/s (1,081 m/s) 2,233 ft·lbf (3,028 J)
90 gr (6 g) SFT 3,280 ft/s (1,000 m/s) 2,151 ft·lbf (2,916 J)
100 gr (6 g) BTSP 3,136 ft/s (956 m/s) 2,184 ft·lbf (2,961

Keep in mind, the lighter bullets need a 1-10 twist, with the 80 grain and above a 1-8.
I have the 1-8, and when shooting the 55 grain, a 6" group at 200 yds is the norm. A 100 grain in the same barrel will cloverleaf a group.

 

[beastep]

25-45 Sharps.