223 Sierra 77G SMK and Nosler Custom Competition Load Data

sighting

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Minuteman
Jan 7, 2014
10
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New here but wanted to share my data with the forum.

With the recent spout of Powder shortage I had to run some loads with Accurate 2520 on my daughters Service Rifle.
Only powder I have available is Accurate 2520 and Accurate 2015
I have some TAC and 2230 arriving next week that I will run through the same test to see which one to settle eon.

Overall Observations:
  • Nosler's as predicted were a tad faster probably due to a better BC but did not group better.
  • I probably could have been allot more accurate on the powder loads but I was a tad tight on time to make make sure I cold get my spot at the range.
  • I am sure if I had a higher power scope I could have grouped a bit better but I just wanted to get a stable replacement load for my daughters Service Rifle.
  • I was surprised how dirty the 2520 was from sub 80 rounds.
  • The last 25.25 load was exponentially more kickback than any of the previous loads
  • There was no visible signs of any flat primers or case marking issues or overpressure signs
  • I really did not feel like taking it past the 25.25 load.
  • 24.60 felt the best in shooting
  • Sierra's seems to be more consistent overall
  • I ran out of time but I also wanted to shoot them against a 5 shot group of IMI Mod 1 and Black Hills Mod 1 (5.56) - I will in the next batch
Any feedback appreciated

Equipment:
Upper: White Oak Armament
Lower: Noveske Gen 3
Trigger: Geissele SSA
Barrel: Krieger 20" 1-7:7
Optics: Leupold 4x33 - White Oak Armament Custom

Chronograph: MagnetoSpeed Lite
Rest: Caldwell The Rock

Conditions:
Temperature: 68° F
Elevation: 50ft
Wind: 3mph
Wind Direction: WNW -> ESE

Powder: Accurate 2550
Primer: CCI #41
Brass / Casing: Nosler Blanks once fired
Bullets: Sierra Matchking 77gr
Bullets: Nosler Custom Competition 77gr
Distance: 100yards
Load Length: 2,261"
Crimp: No crimp just setting die

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Last edited:
Decided to take out some powders today.
All loaded with Sierra 77 SMK's

Equipment:
Upper: White Oak Armament
Lower: Noveske Gen 3
Trigger: Geissele SSA
Barrel: Krieger 20" 1-7:7
Optics: Leupold 4x33 - White Oak Armament Custom
Chronograph: MagnetoSpeed Lite
Rest: Caldwell The Rock

Conditions:
Temperature: 74° F
Elevation: 50ft
Wind: 5mph
Wind Direction: NNW -> SSE

Powder: Varied
Primer: CCI #41
Brass / Casing: Nosler Blanks once fired
Bullets: Sierra Matchking 77gr
Distance: 100yards
Load Length: 2,260"
Crimp: No crimp just setting die

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