Issue: All three shot groups have a flyer (3rd shot). The first two shots from all groups are always right next to each other. One group in particular had the first two shots in the same hole. Each group consists of 3 shots. I'll be using the rifle mainly for long-range hunting (100-600 yds) and sometimes target shooting to 1K. All cases were NOT trimmed as it is still under the maximum chamber length (2.0655"). No pressure signs on all of the groups shot. The reloading recipe I'm using is from Nosler. The maximum power grains is 46.0 but I'm still way below that. Their recommended powder charge is 44.0 for the most accurate load. The case length in their recipe is 2.036". I'm using my chamber length as a guide vs their recipe.
Group 1: The first two shots (B1 & B2) were the same hole. 3rd (B3) shot was 0.47" center to center.
Powder Grains: 42.0
Group 2: 1st and 2nd (B1 & B2)shot are 0.20" center to center. 3rd (B3) shot was 1.49" away.
Powder Grains: 42.5
Group 3: 1st 7 2nd shot was the same hole (B1 & B2). 3rd shot was 1.3" away.
Powder Grains: 43.0
I shot 9 rounds which is the first load I created for my Tikka 260 Rem on a Manners Stock EH1TK (with mini-chassis) and Benchmark barrel. I'm using Forster Coax Press and RCBS dies. Here are the details of my components.
Case: Hornady, once fired
FL Sized: Yes
Chamfered & Deburred: Yes
Shoulder Bump: 002"
Primer: Remington 9 1/2 Large Rifle
Bullet:142 gr Nosler ABLR Spitzer
Powder: H4831SC
Barrel Length: 24"
Barrel Twist: 1:8
Contour: Light Palma
Atmospheric Condition:
Temp = 75F
Wind Direction = 6 O'Clock
Wind Speed = 7.3 MPH
Wind Gust = 12 MPH
Air Pressure = 29.96 inHg
Relative Humidity = 50%
Shooting Distance: 100 yards
Rifle has a bipod and I load it when shooting. I use an ear bag for vertical adjustments.
Used Magnetospeed with bayo firmly attached to the barrel.
Case Dimensions (Length): Difference max out at 0.005"
Case Dimensions (Neck): Only two cases had neck diameters greater than 0.002". C4 -> rookie mistake; probably wrote the first reading wrong.
Bullet Dimensions:
Some primers are deeper. COAL is within 0.005" difference. Base to Ogive has a 0.003"max difference.
Bullet Velocity:
Please note that Case Identifiers match up with Bullet Identifiers ie. B1 is using C1. What is causing the flyers? I can shoot up to 600 yards with my 6.5 CM (Sako TRG 22) and group a shot at 2".
Group 1: The first two shots (B1 & B2) were the same hole. 3rd (B3) shot was 0.47" center to center.
Powder Grains: 42.0
Group 2: 1st and 2nd (B1 & B2)shot are 0.20" center to center. 3rd (B3) shot was 1.49" away.
Powder Grains: 42.5
Group 3: 1st 7 2nd shot was the same hole (B1 & B2). 3rd shot was 1.3" away.
Powder Grains: 43.0
I shot 9 rounds which is the first load I created for my Tikka 260 Rem on a Manners Stock EH1TK (with mini-chassis) and Benchmark barrel. I'm using Forster Coax Press and RCBS dies. Here are the details of my components.
Case: Hornady, once fired
FL Sized: Yes
Chamfered & Deburred: Yes
Shoulder Bump: 002"
Primer: Remington 9 1/2 Large Rifle
Bullet:142 gr Nosler ABLR Spitzer
Powder: H4831SC
Barrel Length: 24"
Barrel Twist: 1:8
Contour: Light Palma
Atmospheric Condition:
Temp = 75F
Wind Direction = 6 O'Clock
Wind Speed = 7.3 MPH
Wind Gust = 12 MPH
Air Pressure = 29.96 inHg
Relative Humidity = 50%
Shooting Distance: 100 yards
Rifle has a bipod and I load it when shooting. I use an ear bag for vertical adjustments.
Used Magnetospeed with bayo firmly attached to the barrel.
Case Dimensions (Length): Difference max out at 0.005"
Case Identifier | Length Before Resizing | Length After Resizing |
C1 | 2.0215" | 2.0265" |
C2 | 2.0240" | 2.0295" |
C3 | 2.0230" | 2.0280" |
C4 | 2.0265" | 2.0320" |
C5 | 2.0250" | 2.0310" |
C6 | 2.0250" | 2.0295" |
C7 | 2.0240" | 2.0295" |
C8 | 2.0230" | 2.0290" |
C9 | Forgot to measure | 2.030" |
Case Dimensions (Neck): Only two cases had neck diameters greater than 0.002". C4 -> rookie mistake; probably wrote the first reading wrong.
Case Identifier | Neck Diameter Before Bullet Seating | Neck Diameter Post Bullet Seating | Difference |
C1 | 0.2890" | 0.2905" | 0.0015" |
C2 | 0.2870" | 0.2900" | 0.003" |
C3 | 0.2875 | 0.2915" | 0.004 |
C4 | 0.2890" | 0.2890" (not sure why this is) | 0.000" |
C5 | 0.2875" | 0.2890" | 0.0015" |
C6 | 0.2875" | 0.2900" | 0.0025" |
C7 | 0.2885" | 0.2895" | 0.001" |
C8 | 0.2875" | 0.2900" | 0.0025" |
C9 | 0.2875" | 0.2985" | 0.002" |
Bullet Dimensions:
Bullet Identifier | Primer Depth | COAL | Bullet Length (base to ogive) |
B1 | 0.005" | 2.8815" | 2.2700" |
B2 | 0.0085" | 2.8840" | 2.2745" |
B3 | 0.0080" | 2.8850" | 2.2750" |
B4 | 0.005" | 2.8830" | 2.2755" |
B5 | 0.005" | 2.8795" | 2.2725" |
B6 | 0.004" | 2.8845" | 2.2740" |
B7 | 0.004" | 2.8845" | 2.2755" |
B8 | 0.0045" | 2.8855" | 2.2745" |
B9 | 0.0045" | 2.8860" | 2.2770" |
Some primers are deeper. COAL is within 0.005" difference. Base to Ogive has a 0.003"max difference.
Bullet Velocity:
Group Identifier | Bullet Identifier | Velocity (fps) | ES (fps) |
G1 | B1 | 2520 | |
B2 | 2498 | ||
B3(flyer) | 2494 | ||
26 | |||
G2 | B4 | 2506 | |
B5 | 2484 | ||
B6(flyer) | 2532 | ||
48 | |||
G3 | B7 | 2562 | |
B8 | 2534 | ||
B9(flyer) | 2562 | ||
60 |
Please note that Case Identifiers match up with Bullet Identifiers ie. B1 is using C1. What is causing the flyers? I can shoot up to 600 yards with my 6.5 CM (Sako TRG 22) and group a shot at 2".
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