243 8 twist heavy bullet powder questions?

[cj8vet]

Trying to work up a load for 1000yd P dogs
8twist,29.5' krieger
trying a stout load of RL-25 right now getting 3130fps,very low SD,using SMK 107
headed out to try berger 105's next but am thinking I may need a diff powder? I hate it at this point, what do I change? pwder,primer,bullet seating depths, guy pulling the trigger?
thanks for comments
mark
always wishing for the magic load

 

[1000yardstare]

I have had excellent .243 1000 yard F Class results with 107 SMKs and 105 AMaxs using RX22, H1000, Retumbo, RX25 and 7828 in a Savage 12FV. The various loads chronod between 2950 and 3050. I settled on a compressed load of RX25 giving 3050 fps which consistently shot 1/2 moa at 300 metres,330 yds) off a bench. Used RCBS competition dies, Win brass, Win primers.

 

[cj8vet]

Thanks Stare, Im using win brass,WLR primers, regular RCBS dies,hadn't ordered my reddings yet) almost a full case of RL25,82clicks on my culver)107smk into the lands but it still goes aways down in the case, getting about 1 MOA at 150yds...gotta leave home to get further. maybe its me
mark

 

[gaintwist]

My experience was with the 243AI loaded with H1000 and HV100,thanks to Joe Hendricks). 30' Lilja 1-8'. Both were excellent and didn't burn my barrel out. I got my best LR performance with the DTAC 115...which you can push much faster than 3000 but I never got better accuracy than the loads around 3K.
-lige

 

[JERRYHM]

Info for the 243AI


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 0.269”, loaded is 0.271” and fired is 0.273”. Sierra 115-grain bullets touch the lands with an OAL of 2.918”. Max. case length = 2.045”, TRIM to = 2.035”. Head Space measurements --- The rifle chamber HS with the 6CM gauge is under +0.002”. I can close the bolt with a +0.006 243 gauge. The new 243 cases have an HS of about –0.002”, 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 28”
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 0.020”, 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 ----

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.




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

The sierra 115’s are shooting smaller groups when seated into the lands, will do more testing with two loads using H1000,47.5 and 48.5 grain) seating the 115’s in the lands at 600 yards.

The new lot of H1000 is VERY slow had to add 7 minutes of elevation for 1000 yards.
Changed to 46 grains of H4831 elevation is back to normal 06-17-2008

Round count = 1308