AR Sponsor
Posted: 8/30/2007 1:47:40 PM EDT
|
INTRO: This is all of my reloading data for the Remington 6.8SPC. A: Speer 90 Gr. TNT: Bullet: .277 Speer 90 Gr. TNT. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.280". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@10') Temp: 80. 26 Gr. of H4198: Avg: 2683fps, Lo: 2656fps, Hi: 2704fps, ES: 48, SD: 15 27.5 Gr. of H4198: Avg: 2787fps, Lo: 2766fps, Hi: 2812fps, ES: 46, SD: 18 28.5 Gr. of H4198: Avg: 2854fps, Lo: 2842fps, Hi: 2873fps, ES: 31, SD: 10 30 Gr. of H322: Avg: 2671fps, Lo: 2661fps, Hi: 2682fps, ES: 21, SD: 8 31.5 Gr. of H322: Avg: 2804fps, Lo: 2801fps, Hi: 2812fps, ES: 11, SD: 4 31 Gr. of H335: Avg: 2580fps, Lo: 2539fps, Hi: 2629fps, ES: 85, SD: 26 32 Gr. of H335: Avg: 2677fps, Lo: 2645fps, Hi: 2737fps, ES: 92, SD: 28 33 Gr. of H335: Avg: 2806fps, Lo: 2749fps, Hi: 2836fps, ES: 87, SD: 24 B: Sierra 90 Gr. HP: Bullet: .277 Sierra 90 Gr. HP. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.280". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Temp: 70. 26.5 Gr. of H4198: Avg: 2733fps, Lo: 2704fps, Hi: 2766fps, ES: 62, SD: 23 27.5 Gr. of H4198: Avg: 2818fps, Lo: 2812fps, Hi: 2824fps, ES: 12, SD: 4 28.5 Gr. of H4198: Avg: 2902fps, Lo: 2861fps, Hi: 2943fps, ES: 82, SD: 31 29 Gr. of H322: Avg: 2627fps, Lo: 2619fps, Hi: 2640fps, ES: 21, SD: 9 30 Gr. of H322: Avg: 2727fps, Lo: 2715fps, Hi: 2737fps, ES: 22, SD: 9 31 Gr. of H322: Avg: 2821fps, Lo: 2801fps, Hi: 2842fps, ES: 41, SD: 15 31 Gr. of H335: Avg: 2633fps, Lo: 2604fps, Hi: 2672fps, ES: 68, SD: 27 32 Gr. of H335: Avg: 2764fps, Lo: 2699fps, Hi: 2830fps, ES: 131, SD: ? 33 Gr. of H335: Avg: 2880fps, Lo: 2867fps, Hi: 2898fps, ES: 31, SD: 13 C: Hornady 100 Gr. SP: Powder: 24.5gr H4198. Bullet: .277 Hornady 100 Gr. SP. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.255". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@10') Temp: 70 24.5 Gr. of H4198: Avg: 2516fps, Lo: 2496fps, Hi: 2525fps, ES: 29, SD: 12 25.5 Gr. of H4198: Avg: 2657fps, Lo: 2624fps, Hi: 2693fps, ES: 69, SD: 31 26.5 Gr. of H4198: Avg: 2691fps, Lo: 2682fps, Hi: 2699fps, ES: 17, SD: 6 26.5 Gr. of H322: Avg: 2423fps, Lo: 2411fps, Hi: 2437fps, ES: 26, SD: 11 27.5 Gr. of H322: Avg: 2505fps, Lo: 2478fps, Hi: 2525fps, ES: 47, SD: 17 28.5 Gr. of H322: Avg: 2586fps, Lo: 2564fps, Hi: 2604fps, ES: 40, SD: 14 30 Gr. of H335: Avg: 2554fps, Lo: 2544fps, Hi: 2559fps, ES: 15, SD: 6 31 Gr. of H335: Avg: 2620fps, Lo: 2614fps, Hi: 2629fps, ES: 15, SD: 6 D: Hornady 110 Gr. V-Max: Bullet: .277 Hornady 110 Gr. V-Max. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.270". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@5') Temp: 80 23.3 Gr. of H4198: Avg: 2397fps, Lo: 2368fps, Hi: 2415fps, ES: 47, SD: 18 24.3 Gr. of H4198: Avg: 2471fps, Lo: 2460fps, Hi: 2482fps, ES: 22, SD: 9 25.3 Gr. of H4198: Avg: 2523fps, Lo: 2515fps, Hi: 2530fps, ES: 15, SD: 6 27 Gr. of H322: Avg: 2435fps, Lo: 2419fps, Hi: 2455fps, ES: 36, SD: 16 28 Gr. of H322: Avg: 2532fps, Lo: 2501fps, Hi: 2569fps, ES: 68, SD: 25 29 Gr. of H322: Avg: 2607fps, Lo: 2569fps, Hi: 2624fps, ES: 55, SD: 21 27.5 Gr. of H335: Avg: 2388fps, Lo: 2372fps, Hi: 2398fps, ES: 26, SD: 9 28.5 Gr. of H335: Avg: 2470fps, Lo: 2446fps, Hi: 2487fps, ES: 41, SD: 16 29.5 Gr. of H335: Avg: 2585fps, Lo: 2544fps, Hi: 2629fps, ES: 85, SD: 32 E: Sierra 110 Gr. Pro-Hunters: Bullet: .277 Sierra 110 Gr. Pro-Hunters. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.280". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@5') Temp: 80 23.3 Gr. of H4198: Avg: 2319fps, Lo: 2294fps, Hi: 2339fps, ES: 45, SD: 18 24.3 Gr. of H4198: Avg: 2408fps, Lo: 2393fps, Hi: 2419fps, ES: 26, SD: 10 25.3 Gr. of H4198: Avg: 2482fps, Lo: 2473fps, Hi: 2496fps, ES: 23, SD: 9 27 Gr. of H322: Avg: 2396fps, Lo: 2389fps, Hi: 2402fps, ES: 13, SD: 5 28 Gr. of H322: Avg: 2457fps, Lo: 2442fps, Hi: 2482fps, ES: 40, SD: 17 29 Gr. of H322: Avg: 2501fps, Lo: 2496fps, Hi: 2515fps, ES: 19, SD: 5 28.5 Gr. of H322: Chrony Data (@10'): Avg: 2483fps, Lo: 2464fps, Hi: 2515fps, ES: 51, SD: 14 29 Gr. of H322: Chrony Data (@10'): Avg: 2534fps, Lo: 2520fps, Hi: 2544fps, ES: 24, SD: 8 27.5 Gr. of H335: Avg: 2349fps, Lo: 2339fps, Hi: 2359fps, ES: 20, SD: 7 28.5 Gr. of H335: Avg: 2401fps, Lo: 2389fps, Hi: 2411fps, ES: 22, SD: 8 29.5 Gr. of H335: Avg: 2494fps, Lo: 2455fps, Hi: 2549fps, ES: 94, SD: 34 F: SSA 115 Gr. Enhanced SMK: Bullet: .277 SSA 115 Gr. Enhanced SMK. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. OAL: 2.240". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@5') Temp: 80 22 Gr. of H4198: Avg: 2184fps, Lo: 2168fps, Hi: 2203fps, ES: 35, SD: 15 23 Gr. of H4198: Avg: 2250fps, Lo: 2240fps, Hi: 2263fps, ES: 23, SD: 9 24 Gr. of H4198: Avg: 2343fps, Lo: 2326fps, Hi: 2351fps, ES: 25, SD: 11 26.2 Gr. of H322: Avg: 2281fps, Lo: 2196fps, Hi: 2237fps, ES: 41, SD: 15 27.2 Gr. of H322: Avg: 2378fps, Lo: 2372fps, Hi: 2385fps, ES: 13, SD: 5 28.2 Gr. of H322: Avg: 2461fps, Lo: 2442fps, Hi: 2482fps, ES: 40, SD: 18 27 Gr. of H335: Avg: 2221fps, Lo: 2196fps, Hi: 2237fps, ES: 41, SD: 15 28 Gr. of H322: Avg: 2334fps, Lo: 2322fps, Hi: 2347fps, ES: 25, SD: 10 29 Gr. of H322: Avg: 2444fps, Lo: 2428fps, Hi: 2478fps, ES: 50, SD: 19 G: Sierra 115 Gr. SMK: Bullet: .277 Sierra 115 Gr. SMK. Brass: SSA. Primer: Winchester #6 1/2. Crimp: Roll Crimp. Cannelures: Rolled my own using Corbin cannelure tool. OAL: 2.280". Gun: Ko-Tonics 16" Chrome Lined 1:11" twist. Chrony Distance: (@10') Temp: 80 26 Gr. of H322: Avg: 2253fps, Lo: 2240fps, Hi: 2271fps, ES: 31, SD: 9 28.5 Gr. of H322: Avg: 2470fps, Lo: 2442fps, Hi: 2501fps, ES: 59, SD: 17 29.5 Gr. of H322: Avg: 2553fps, Lo: 2530fps, Hi: 2574fps, ES: 44, SD: 14 |
|
Paul, I was noticing your Pro Hunter loads, and it looks like that when you hit 29 grains of H322 the spread and deviation numbers improved. Do you happen to remember what the accuracy was like for that particular load? - Tim (EDITED TO ADD:) OOPS! This is Tim of Ko-tonics, Carbine_Man is my non-business persona, and I forgot to logoff/login before posting. |
Tim, with the 28.5 Grains of H322 I got two 5 round groups of .8". With the 29 Gr. of H322 I got one .6" group and the other was 1". So they are probably the same in accuracy. The first time I tested the Pro-Hunters, the 28.5 Gr. and 29 Gr. shot the same as this time. |
The Speer 90 Gr. with a 100 yard zero and a velocity of 2854fps with 28.5 Gr. of H4198 will have a -12.3" drop (-1.1Mil). The Sierra 90 Gr. with a 100 yard zero and a velocity of 2902fps with 28.5 Gr. of H4198 will have a -14.1" drop (-1.3Mil). At 600 yards the Speer 90 Gr. will have a 108.5" drop (-5.0Mil). At 600 yards the Sierra 90 Gr. will have a -142.1" drop (-6.6Mil). |
I agree with that, but if you look at the construction of the two, the Speer 90 Gr. is built more like a VLD, while the Sierra has a large hollow-point on it. The max I can shoot out to is 300 yards, so I can't confirm anything past 300 yards. At 300 yards they are almost the same. |
AR Sponsor
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.