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If you want a 6.5mm to hunt with but are concerned about bolt life and feeding the SIX5 is an option.
This is a 6.5mm wildcat based on the 6.8 SPC case that uses stronger bolts and feeds better from the 6.8 mags. These barrels can be very accurate(1/2MOA) with 100gr TTSX, 120gr TSX, 100 Amax, 120 Nosler, 100 Nosler Partition, 95 Vmax. The 100gr bullets at 2800fps are a sweet spot for a case the size of the Grendel or 6.8. They will out perform any of the 123gr bullets out of the Grendels 2500fps all the way to 800yds. These 16" barrels are perfect for those that love the Barnes 100gr TTSX bullets and want a shorter barrel to hunt with.
4150 CMV 11595E barrel steel. Barrels have a Hybrid 5R rifling with 1 in 8.5 twist .
Barrels have M4 feed ramps, mid length gas system, .800 under the guard, .750 gas block dia. .718 dia from gas block to muzzle. 5/8-24 thread muzzle. Barrels have helical flutes ($120 option in many places)
By trimming the 6.8 case back to 1.610-1.615 the Hornady 123 Amax and SST, Barnes 100 and 120 TTSX, 120 TSX. Nosler 100 and 120 NBT can be loaded to the cannelure in a 41mm long 6.8 case to 2.31"and fit in unmodified Magpul SIX8 pmags or PRI 6.8 mags. Please read the load data below carefully before purchasing , it takes loading long(OAL), max mag length to get the best accuracy. Never use a neck sizing dies to size brass for an AR15. If you do not understand what it takes to get accuracy from this round please call before purchasing. Mags that allow loading longer than 2.3" are available from Cavity Back Bullets.
6.8 FL bushing dies with a .284-.288 bushing and trimming the case to 1.610" is needed to reload. The chamber has a .297 neck 1.5 degree throat angle for better accuracy and to prevent splitting the case necks from over working the brass. Do NOT have to fire-form just size trim and load.
This is a barrel only, it does NOT include any other parts unless added below as an option.
Bullfrog Rusthunter is known to cause discoloration of Melonite surfaces.
NOTE: When forming the brass the first time it must be done correctly to get good accuracy. When setting the shoulder location it is best to set the dies .002-.004" under the chamber size.
All loads below should be considered max. Start 1-2gr lower and workup while looking for accuracy.
Pressures shown are from actual pressure tests not calculated from quickload.
The 123 SST and Amax must be loaded to 2.31+ to get the best accuracy. The 120 Nosler 2.3"seems to work well.
Try these loads-they have been tested for accuracy using Hornady brass, Wolf magnum primers and all shoot under 1 MOA some under 1/2 MOA out of the 16" barrels.
100gr Barnes TTSX -OAL 2.3-2.31" 28.5gr 10x ---max load, do not use more than 28.5 10x--.4 MOA --most accurate load tested.
100gr Hornady Amax -OAL 2.295-2.31 28gr 10x ---max load
120gr Barnes TSX--OAL 2.32-30gr AA2520---max load
120 Nosler BT-OAL 2.3-2.31"-30gr AA2520---max load
123gr Amax OAL 2.31-2.32-30gr AA2520---max load
Drop 1/2-1 gr if using CCI magnum primers or Federal brass. All of those loads above are compressed but shoot very well.
123 Amax 2.310" OAL SSA brass, CCI450 primer
100gr Amax-best at 2.295 OAL drop at least 1 gr from max
N530-29.5gr=2788fps>59700psi---29 max>27gr apx 1"
8208-29.8gr=2684fps>56669psi--max fill> 28gr apx 1"
X-term 31.5gr 2775>56388psi>28gr apx 1"