Nosler 77 Grain Custom Competition

[Molon]

Nosler 77 Grain Custom Competition





In 2003, Nosler introduced their .224" 77 grain Custom Competition HPBT bullet as an obvious competitor to the 77 grain Sierra MatchKing. The shape and ballistic coefficient of the Nosler bullet is very similar to that of the Sierra MatchKing. The Nosler bullet does have one major difference from the Sierra MatchKing; it is constructed using the thinner J4 copper jacket.

I recall an early Nosler advertisement for their Custom Competition bullet that included a phrase saying the bullet was “ideal for military and law enforcement,” hinting at the possibilities of improved fragmentation due to the thinner J4 jacket. Thanks to the works of Dr. G.K. Roberts and B&T Ammo Labs, we know that the 77 grain Nosler bullet loaded to 5.56mm velocities has superior terminal ballistic properties to that of the 77 grain Sierra MatchKing loaded in MK262. The terminal ballistic properties of the 77 grain Nosler bullet loaded to 5.56mm velocities rival that of the Hornady 75 grain 5.56mm TAP load.





Courtesy of Dr. G.K. Roberts





Courtesy of B&T Ammo Labs




The Nosler 77 grain Custom Competion bullet is typically sold without a cannelure, however Nosler occasionally releases the bullet with a shallow cannelure similar to the one found on the 77 grain SMK loaded in MK262. The cannelured version of the 77 grain Nosler will be the focus of this report.



















For the first phase of testing, I hand-loaded the cannelured version of the 77 grain Nosler BTHP to a typical SAAMI velocity (approximately 2600 fps from a 20” Colt barrel) to establish an accuracy baseline. No case mouth crimp was applied at this phase. As per my usual protocol, accuracy testing was conducted from a concrete benchrest at a distance of 100 yards. The forend of my Krieger barreled AR-15 rested in a Sinclair Windage Benchrest, while the stock of the rifle rode in a Protektor bunny-ear rear bag. A Leupold Competition Scope was used for sighting. Wind conditions were monitored using a Wind Probe.









Three 10-shot groups were obtained which had extreme spreads of:

0.797”
0.827”
0.812”

for a 10-shot group average of 0.812”. The three groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The composite group had a mean radius of 0.26”. This test shows that the Nosler bullet itself is capable of consistent sub-MOA accuracy at 100 yards when fired from a semi-automatic AR-15.














For the second phase of testing, I safely worked up a load for the 77 grain Nosler BTHP to a nominal muzzle velocity of 2800 fps from a 20” barrel using a non-canister grade military powder. (In previous testing, I found that the average muzzle velocity from seven different lots of Hornady 5.56 TAP was 2808 fps from a 20” barrel.) No case mouth crimp was used in this phase of testing either.

Since my Krieger barreled AR-15 has a 5.56mm Match chamber that is “a little too tight” for mil-spec pressure loads, I used my AR-15 with a 20” Noveske DCM barrel for this phase of testing. This Noveske barrel has the “Noveske Match Mod 0 chamber which is designed to offer 100% reliability while retaining maximum possible accuracy. The chamber body is slightly larger than the 5.56mm NATO minimum, but within the 5.56 NATO tolerance. The throat is redesigned for proper bullet alignment with the axis of the bore. This chamber was developed to fire MK262 Mod 1 on AUTO in hot environments."









Accuracy testing using the Noveske barreled AR-15 and Nosler 77 grain BTHP at a muzzle velocity of 2800 fps was conducted in the same manner as described above in the first phase of testing. Three 10-shot groups were obtained from 100 yards. Those groups had extreme spreads of:

0.880”
0.857”
0.845”

for a 10-shot group average of 0.860”. These groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group which had a mean radius of 0.29”.














For the final phase of testing I added a taper crimp to the case mouth of the previously described load used in phase two. A 10-shot string of this load fired over the Oehler 35-P chronograph from my 20” Novekse barrel had a muzzle velocity of 2801 fps with a standard deviation of 12 fps.

Three 10-shot groups fired from 100 yards from the 20” Noveske DCM barrel had extreme spreads of:

1.033”
0.914”
1.241”

for a 10-shot group average of 1.063”. As before, the three groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the composite group was 0.31”.












….






Nosler's 223 Remington 77 grain Custom Competition factory loaded ammunition uses the cannelured verison of the bullet. When chronographed from a 20" Colt barrel, this load had a muzzle velocity of 2612 fps with a standard deviation of 19 fps. A 10-shot group fired from my Krieger barreled AR-15 had an extreme spread of 0.98” and a mean radius of 0.31”.







....

[Former11B]

Curious what powder and loads you used for the hand loaded portion. I've just had some good luck with 77s and found the node my rifle likes after doing a lot of testing

Debating selling about 500ct Hornady 68gr BTHPs to get 77gr Noslers. I have always liked the Nosler CC line; I have a 1:9 bolt gun that loves their 52gr BTHPs (22.5gr RE10x) and my 16" Match AR shoots their 69gr BTHP superbly with 24.1gr of RE15

[mustangfreek]

Curious also what powder/charge/etc on the 77gr loads

Just recently broke out some of these Nosler 77's and experimenting with fine TAC , as running low on others and have more tac then anything and haven't used it yet..

[Slippers]

Curious also what powder/charge/etc on the 77gr loads

Just recently broke out some of these Nosler 77's and experimenting with fine TAC , as running low on others and have more tac then anything and haven't used it yet..

TAC works well with the nosler 77 cc. I run 23.1 gr, 2.26 OAL, CCI #41. It's not quite as fast as real mk262 but I've shot it to 800 yards without a problem.

[Former11B]

Curious also what powder/charge/etc on the 77gr loads

Just recently broke out some of these Nosler 77's and experimenting with fine TAC , as running low on others and have more tac then anything and haven't used it yet..

I'm running 23.1gr RE15 with Nosler CC and SMK 77s at 2.26" OAL and CCI #400 or BR-4 primers with no crimp

6-4-16 edit
23.6gr grouped and shot really well at 100, 200, and 300 yards

[mustangfreek]

Thanks guys

TAC works well with the nosler 77 cc. I run 23.1 gr, 2.26 OAL, CCI #41. It's not quite as fast as real mk262 but I've shot it to 800 yards without a problem.

Nice, I also use CCI 450 mag primers for all my rifle loads

Curious, have any chrono data for that load, curious about where that's at? I have some ladder test loads ready to shoot but still no chrono and I have some at that same charge just at 2.250

[Slippers]

I'll have to look up the exact numbers from the last time I chronographed it. Out of my 18" Noveske SPR barrel I believe it was around 2550-2600. Like I said, not nearly as fast as real MK262, which clocks in around 2700 in the same barrel. You'll get a tad closer going up to max load, whichi s 23.5 gr TAC according to the Nosler data.

[mustangfreek]

Thanks for the info, now to get out there and see how these do.