243 /115 DTACS FOR F CLASS
- Thread starter newboy
- Start date
6CM LOADING NOTES FOR REFERENCE ONLY
Reamer used was the 6CM LR a version of a 243 Winchester improved. Action: BAT single shot model B.
Winchester 243 Brass was prepped and sorted into lots by weights. Neck diameter new and resized is 0.269â€, loaded is 0.271†and fired is 0.273â€. Sierra 115-grain bullets touch the lands with an OAL of 2.918â€. Max. case length = 2.045â€, TRIM to = 2.035â€. Head Space measurements --- The rifle chamber HS with the 6CM gauge is under +0.002â€. I can close the bolt with a +0.006 243 gauge. The new 243 cases have an HS of about –0.002â€, meaning the HS is about 0.008†when fire forming with new win brass.
NOV 10, 2006
New barrel installed, Krieger 1:7.5 length is 28â€
Load test at 100 yards on 11-10-2006 at Sacramento temp was 40 degrees.
Powder = H1000, Primers = CCI-BR2, Case = Winchester, OAL = 2.900†jumping 0.020â€, Sierra 115 grain bullets.
Chronograph numbers are questionable with the dim light.
47.0 grains MV=2956 Group = 0.426†five shots
47.5 grains MV=3010 Group = 0.331†five shots
48.0 grains MV=3066 Group = 0.375†five shots
48.5 grains MV=3089 Group = 0.397†TEN shots ---- Round count thru barrel = 65
First Match ----- three 600-yard prone matches, iron sights 11-11-2006
Conditions at Sacramento 40 degrees, light rain, dim light, heavy wet wind flags that could not show the changes.
Match Winner with a 598-30X
First 600 using 47.5 gr. = 200-09X
Second 600 using 48.0 gr. = 198-09X
Third 600 using 48.5 gr. = 200-11X
The 48.5-grain load did shoot the best; all three loads shot very good elevation.
The Sunday 1000 yard matches. 11-12-2006
Any-any match I was one X behind first place with a 199-10x
There were NO elevation problems at 1000 yards. Round count thru barrel=182
12-18-2006 Sacramento temp=28 degrees.
Loaded S107s with an OAL of 2.890†jumping 0.020â€, 47.7 grains of Varget for FIRE FORMING at 600 yards.
Fired 45 rounds most were sub-xring. Round count = 230
04-13-2007 Load testing at Sacramento temp = 60 degrees. NF BR42X at 300 yards E = 0 –,-2.00) W = 4 – 4.00
Wind gusting may have caused the groups to open up abit. Did see some horizontal spreading.
All five shot groups. All at 300 YARDS.
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD – Group -------- Comments
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3060 – 45 - -- --- 0.708 MOA - FIRE FORMING
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3061 – 11 – 04 -- 0.799 MOA
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3076 – 15 – 06 -- 0.509 MOA
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3057 – 27 – 12 -- 0.667 MOA – NEW LOT BR2’s
H4831 – 43.0 gr. – BR2 – S115 – jump 0.015†– 2933 – 12 – 04 -- 0.770 MOA
H4831 – 43.5 gr. – BR2 – S115 – jump 0.015†– 2959 – 18 – 06 -- 0.760 MOA
H4831 – 44.0 gr. – BR2 – S115 – jump 0.015†– 2980 – 14 – 05 -- 0.711 MOA
H4831 – 43.0 gr. – BR2 – S107 – jump 0.015†– 2965 – 51 – 20 -- 0.435 MOA
H4831 – 43.5 gr. – BR2 – S107 – jump 0.015†– 2977 – 21 – 09 -- 0.541 MOA
H4831 – 44.0 gr. – BR2 – S107 – jump 0.015†– 2996 – 17 – 07 -- 0.518 MOA
H4831 – 43.0 gr. – BR2 – S107 – jump 0.015†– 2948 – 33 – 13 -- 0.662 MOA – Pointed 107’s
H4831 – 43.5 gr. – BR2 – S107 – jump 0.015†– 2958 – 23 – 09 -- 0.946 MOA – Pointed 107’s
H4831 – 44.0 gr. – BR2 – S107 – jump 0.015†– 3001 – 33 – 12 -- 0.631 MOA – Pointed 107’s
Round count = 462 Sierra 115 lands at 2.936, Sierra 107 lands at 2.937.
04-14-2007 Load testing at Sacramento temp = 52 degrees, raining with 2 to 6 MPH winds. NF BR42X at 100 yards
UON: all five shot groups
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD – Group -------- Comments
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3043 – 12 - 05 --- 0.496 - FIRE FORMING
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3055 – 40 - 14 --- 0.681 - FIRE FORMING 10 shots
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3075 – 20 – 07 -- 0.548
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3058 – 13 – 05 -- 0.462
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3085 – 26 – 10 -- 0.618
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3080 – 07 – 03 -- 0.374
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3075 – 07 – 03 -- 0.357
H1000 – 48.0 gr. – BR2 – S115 – jump 0.015†– 3096 – 21 – 07 -- 0.541
H1000 – 48.0 gr. – BR2 – S115 – in…. 0.015†– 3086 – 23 – 10 -- 0.375
H1000 – 48.5 gr. – BR2 – S115 – jump 0.015†– 3125 – 22 – 08 -- 0.686
H1000 – 48.5 gr. – BR2 – S115 – in…. 0.015†– 3134 – 32 – 12 -- 0.330
H1000 – 48.0 gr. – BR2 – S107 – jump 0.015†– 3139 – 19 – 07 -- 0.407
H1000 – 48.5 gr. – BR2 – S107 – jump 0.015†– 3153 – 20 – 08 -- 0.370
H1000 – 49.0 gr. – BR2 – S107 – jump 0.015†– 3188 – 19 – 07 -- 0.694
H4831 – 44.5 gr. – BR2 – S115 – jump 0.015†– 3011 – 28 – 10 -- 0.982
H4831 – 45.0 gr. – BR2 – S115 – jump 0.015†– 3036 – 15 – 06 -- 0.251
H4831 – 45.5 gr. – BR2 – S115 – jump 0.015†– 3049 – 20 – 10 -- 0.766
H4831 – 44.5 gr. – BR2 – S107 – jump 0.015†– 3052 – 22 – 08 -- 0.229
H4831 – 45.0 gr. – BR2 – S107 – jump 0.015†– 3080 – 14 – 06 -- 0.404
H4831 – 45.5 gr. – BR2 – S107 – jump 0.015†– 3104 – 17 – 07 -- 0.571
Round count = 568
4-24-2007 Sacramento 1000 yards with Irons = 199-9x.
05-21-2007 at Sacramento Load Testing the Sierra 117 grain bullets. Temp = 66 degrees at 08:00.
OALs for the 117s = 2.980â€, for the 115’s = 2.950†and for the 107’s = 2.953†to touch the lands.
All five shot groups 100 yards..
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD
H1000 – 47.5 gr. – BR2 – S115 – jump 0.020†– 3059 – 30 - 11 ---- S115s for reference…
H1000 – 47.5 gr. – BR2 – S115 – jump 0.020†– 3070 – 22 - 08 ----
H1000 – 47.0 gr. – BR2 – S117 – jump 0.020†– 2979 – 19 – 08
H1000 – 47.0 gr. – BR2 – S117 – jump 0.020†– 2990 – 23 – 08
H1000 – 47.5 gr. – BR2 – S117 – jump 0.020†– 3009 – 18 – 08
H1000 – 47.5 gr. – BR2 – S117 – jump 0.020†– 3009 – 23 – 09
H1000 – 48.0 gr. – BR2 – S117 – jump 0.020†– 3045 – 31 – 12
H1000 – 48.0 gr. – BR2 – S117 – jump 0.020†– 3037 – 17 – 07
H1000 – 48.5 gr. – BR2 – S117 – jump 0.020†– 3080 – 25 – 09
H1000 – 48.5 gr. – BR2 – S117 – jump 0.020†– 3078 – 18 – 08
The 48 grains load produced the smallest vert groups.,one group was 0.059†vertical) gusting winds opened the horz part of the groups.
Reamer used was the 6CM LR a version of a 243 Winchester improved. Action: BAT single shot model B.
Winchester 243 Brass was prepped and sorted into lots by weights. Neck diameter new and resized is 0.269â€, loaded is 0.271†and fired is 0.273â€. Sierra 115-grain bullets touch the lands with an OAL of 2.918â€. Max. case length = 2.045â€, TRIM to = 2.035â€. Head Space measurements --- The rifle chamber HS with the 6CM gauge is under +0.002â€. I can close the bolt with a +0.006 243 gauge. The new 243 cases have an HS of about –0.002â€, meaning the HS is about 0.008†when fire forming with new win brass.
NOV 10, 2006
New barrel installed, Krieger 1:7.5 length is 28â€
Load test at 100 yards on 11-10-2006 at Sacramento temp was 40 degrees.
Powder = H1000, Primers = CCI-BR2, Case = Winchester, OAL = 2.900†jumping 0.020â€, Sierra 115 grain bullets.
Chronograph numbers are questionable with the dim light.
47.0 grains MV=2956 Group = 0.426†five shots
47.5 grains MV=3010 Group = 0.331†five shots
48.0 grains MV=3066 Group = 0.375†five shots
48.5 grains MV=3089 Group = 0.397†TEN shots ---- Round count thru barrel = 65
First Match ----- three 600-yard prone matches, iron sights 11-11-2006
Conditions at Sacramento 40 degrees, light rain, dim light, heavy wet wind flags that could not show the changes.
Match Winner with a 598-30X
First 600 using 47.5 gr. = 200-09X
Second 600 using 48.0 gr. = 198-09X
Third 600 using 48.5 gr. = 200-11X
The 48.5-grain load did shoot the best; all three loads shot very good elevation.
The Sunday 1000 yard matches. 11-12-2006
Any-any match I was one X behind first place with a 199-10x
There were NO elevation problems at 1000 yards. Round count thru barrel=182
12-18-2006 Sacramento temp=28 degrees.
Loaded S107s with an OAL of 2.890†jumping 0.020â€, 47.7 grains of Varget for FIRE FORMING at 600 yards.
Fired 45 rounds most were sub-xring. Round count = 230
04-13-2007 Load testing at Sacramento temp = 60 degrees. NF BR42X at 300 yards E = 0 –,-2.00) W = 4 – 4.00
Wind gusting may have caused the groups to open up abit. Did see some horizontal spreading.
All five shot groups. All at 300 YARDS.
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD – Group -------- Comments
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3060 – 45 - -- --- 0.708 MOA - FIRE FORMING
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3061 – 11 – 04 -- 0.799 MOA
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3076 – 15 – 06 -- 0.509 MOA
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3057 – 27 – 12 -- 0.667 MOA – NEW LOT BR2’s
H4831 – 43.0 gr. – BR2 – S115 – jump 0.015†– 2933 – 12 – 04 -- 0.770 MOA
H4831 – 43.5 gr. – BR2 – S115 – jump 0.015†– 2959 – 18 – 06 -- 0.760 MOA
H4831 – 44.0 gr. – BR2 – S115 – jump 0.015†– 2980 – 14 – 05 -- 0.711 MOA
H4831 – 43.0 gr. – BR2 – S107 – jump 0.015†– 2965 – 51 – 20 -- 0.435 MOA
H4831 – 43.5 gr. – BR2 – S107 – jump 0.015†– 2977 – 21 – 09 -- 0.541 MOA
H4831 – 44.0 gr. – BR2 – S107 – jump 0.015†– 2996 – 17 – 07 -- 0.518 MOA
H4831 – 43.0 gr. – BR2 – S107 – jump 0.015†– 2948 – 33 – 13 -- 0.662 MOA – Pointed 107’s
H4831 – 43.5 gr. – BR2 – S107 – jump 0.015†– 2958 – 23 – 09 -- 0.946 MOA – Pointed 107’s
H4831 – 44.0 gr. – BR2 – S107 – jump 0.015†– 3001 – 33 – 12 -- 0.631 MOA – Pointed 107’s
Round count = 462 Sierra 115 lands at 2.936, Sierra 107 lands at 2.937.
04-14-2007 Load testing at Sacramento temp = 52 degrees, raining with 2 to 6 MPH winds. NF BR42X at 100 yards
UON: all five shot groups
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD – Group -------- Comments
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3043 – 12 - 05 --- 0.496 - FIRE FORMING
H1000 – 47.7 gr. – BR2 – S107 – jump 0.015†– 3055 – 40 - 14 --- 0.681 - FIRE FORMING 10 shots
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3075 – 20 – 07 -- 0.548
H1000 – 47.5 gr. – BR2 – S115 – jump 0.015†– 3058 – 13 – 05 -- 0.462
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3085 – 26 – 10 -- 0.618
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3080 – 07 – 03 -- 0.374
H1000 – 47.5 gr. – BR2 – S115 – in…. 0.015†– 3075 – 07 – 03 -- 0.357
H1000 – 48.0 gr. – BR2 – S115 – jump 0.015†– 3096 – 21 – 07 -- 0.541
H1000 – 48.0 gr. – BR2 – S115 – in…. 0.015†– 3086 – 23 – 10 -- 0.375
H1000 – 48.5 gr. – BR2 – S115 – jump 0.015†– 3125 – 22 – 08 -- 0.686
H1000 – 48.5 gr. – BR2 – S115 – in…. 0.015†– 3134 – 32 – 12 -- 0.330
H1000 – 48.0 gr. – BR2 – S107 – jump 0.015†– 3139 – 19 – 07 -- 0.407
H1000 – 48.5 gr. – BR2 – S107 – jump 0.015†– 3153 – 20 – 08 -- 0.370
H1000 – 49.0 gr. – BR2 – S107 – jump 0.015†– 3188 – 19 – 07 -- 0.694
H4831 – 44.5 gr. – BR2 – S115 – jump 0.015†– 3011 – 28 – 10 -- 0.982
H4831 – 45.0 gr. – BR2 – S115 – jump 0.015†– 3036 – 15 – 06 -- 0.251
H4831 – 45.5 gr. – BR2 – S115 – jump 0.015†– 3049 – 20 – 10 -- 0.766
H4831 – 44.5 gr. – BR2 – S107 – jump 0.015†– 3052 – 22 – 08 -- 0.229
H4831 – 45.0 gr. – BR2 – S107 – jump 0.015†– 3080 – 14 – 06 -- 0.404
H4831 – 45.5 gr. – BR2 – S107 – jump 0.015†– 3104 – 17 – 07 -- 0.571
Round count = 568
4-24-2007 Sacramento 1000 yards with Irons = 199-9x.
05-21-2007 at Sacramento Load Testing the Sierra 117 grain bullets. Temp = 66 degrees at 08:00.
OALs for the 117s = 2.980â€, for the 115’s = 2.950†and for the 107’s = 2.953†to touch the lands.
All five shot groups 100 yards..
Powder – Load –Primer – Bullet – OAL ---------- MV – ES - SD
H1000 – 47.5 gr. – BR2 – S115 – jump 0.020†– 3059 – 30 - 11 ---- S115s for reference…
H1000 – 47.5 gr. – BR2 – S115 – jump 0.020†– 3070 – 22 - 08 ----
H1000 – 47.0 gr. – BR2 – S117 – jump 0.020†– 2979 – 19 – 08
H1000 – 47.0 gr. – BR2 – S117 – jump 0.020†– 2990 – 23 – 08
H1000 – 47.5 gr. – BR2 – S117 – jump 0.020†– 3009 – 18 – 08
H1000 – 47.5 gr. – BR2 – S117 – jump 0.020†– 3009 – 23 – 09
H1000 – 48.0 gr. – BR2 – S117 – jump 0.020†– 3045 – 31 – 12
H1000 – 48.0 gr. – BR2 – S117 – jump 0.020†– 3037 – 17 – 07
H1000 – 48.5 gr. – BR2 – S117 – jump 0.020†– 3080 – 25 – 09
H1000 – 48.5 gr. – BR2 – S117 – jump 0.020†– 3078 – 18 – 08
The 48 grains load produced the smallest vert groups.,one group was 0.059†vertical) gusting winds opened the horz part of the groups.
I shoot the 115gr Dtac in a .243Ai with good results.
My loads are for the bare 115's 45.5gr Re-22 = 3120 fps Thats my go to load for that bullet. all use CCI Br2 primers.
with the 115 Dtac BN coated I use 46gr Re-22 = 3065 fps or 45.5gr Vit N-165. both have the same velo. and shoot very well.
Those loads should probobly be started 5% less!! My rifle seems to like a little extra powder.
Hopefully Friday Ill be at the 600yd range and will get to test the rifle. Shooting off a bi pod. So far any of the listed loads have shot a best of about 1.2' at 275 yards.
Jerid
My loads are for the bare 115's 45.5gr Re-22 = 3120 fps Thats my go to load for that bullet. all use CCI Br2 primers.
with the 115 Dtac BN coated I use 46gr Re-22 = 3065 fps or 45.5gr Vit N-165. both have the same velo. and shoot very well.
Those loads should probobly be started 5% less!! My rifle seems to like a little extra powder.
Hopefully Friday Ill be at the 600yd range and will get to test the rifle. Shooting off a bi pod. So far any of the listed loads have shot a best of about 1.2' at 275 yards.
Jerid
newboy,
I'm going to a 6CM, I have a ton of .243 brass and plan to shoot the 115 also. I think you should do the research on it also, it helped me decide.
I'm going to a 6CM, I have a ton of .243 brass and plan to shoot the 115 also. I think you should do the research on it also, it helped me decide.
Man go to the HOME Page click on the 243/243ai link at the top/side and do what George Gardner does. When he shot the '06 snipers hide match he won the '1000yd' part of the match running a striaght .243win with 115 dtacs...he beat out David Tubb with his 6XC and Terry Cross with his .260ai. In my opinion you don't need any more than that. Like it says in the article no fire forming, no donaughts, reliable feeding and 'the reason I am building a .243' brass is everywhere. Run Lapua, run Winchester my local stores have piles of it. My rifle will be a tactile rifle that I will use in F-class..Surgeon action, Accuracy International chassis system, Bartlein barrel, US Optics...mmmmmm Giggidy!!!
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