MarshallDodge
Member
Those of you that are having success with these, what is the velocity that you are using? Twist rate?
Post some groups if you can.
Post some groups if you can.
69 RMR velocity question
- Thread starter MarshallDodge
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AJC1
Member
This was a 24.0 grain group(5 shot) of tac that I was playing with. 2.260 no further development. 1:7 30" shilen
kmw1954
Member
I have 2 Savage rifles in 223Rem, a Model 10 with 22" Sporter barrel with 1:9 twist and a Model 11 with a 26" Heavy Varmint barrel. The model 10 loves them and will shoot 3/4MOA with a number of different powders. The Model 11 will not shoot them at all. It hates them and again have tried 4 different powders. With the Model 10 when I was shooting across a chrono I couldn't get a good steady speed. Best Extreme Spread I ever achieved as a 26FPS and that was only once. Otherwise it was on the 40-60FPS range and on occasion even higher than that but it was still shooting small -MOA groups to 300yds. and a lot of that was my own inexperience. These were with a front bipod and rear bag.
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MarshallDodge
Member
Do you know the FPS average?
It is hard to get low ES in 223. Every small change affects it.
kmw1954
Member
With out going and digging up notes from 2 years ago the best I can remember was in the area of around 2850FPS. give or take depending on the powder. As I recall there was also a load that was very nice around 2700
Blue68f100
Member
The twist rate is probably too slow for the Model 11, 1:9 to stabilize it. Most of my AR's have a Shillen 1:9 twist barrel and groups start to open up once I get above 60gr.. My 1:8 twist shot sub moa with most any 69gr bullet. Now the 52gr SMK are go to for max accuracy in my 1:9 & 1:10 twist barrels.
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MarshallDodge
Member
I'm guessing that your model 11 has a 1:12 twist rate barrel?
kmw1954
Member
Sorry, meant to include the Model 11 twist rate in the description but it too is a 1:9 twist and the barrel is actually a Model 12 223 Heavy Varmint 26". Have also fired Barnes, Hornady, Nosler and Sierra and the two it likes the least are the 68gr Hornady Match and the 69gr RMR.
69 grain SMK data
SW Tactical Rifle powder
2750 fps give or take
1/7 twist 20” barrel
Still tinkering though. I thought I had a good load but I have to grasp the easiest person for me to fool is me.
Edited to add the estimated velocity for the best load I think I have. It’s closer to max charge than I thought.
SW Tactical Rifle powder
2750 fps give or take
1/7 twist 20” barrel
Still tinkering though. I thought I had a good load but I have to grasp the easiest person for me to fool is me.
Edited to add the estimated velocity for the best load I think I have. It’s closer to max charge than I thought.
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MarshallDodge
Member
I'm struggling. This rifle is an R700 with an 18" 1:8 twist Bartlein. It shoots the Hornady 62 or 68 BTHP into .5" or less at 100 with 24.0 TAC. 77 SMK shoots tiny groups with just about any common 223 powder I put behind it, including a hot load of H322.
I've stayed at 24 grains of TAC and IMR 4320 with different seating depths. Next I am going to try 24.4 and 24.7.
Larry in wyoming
Member
- Joined
- Dec 10, 2021
- Messages
- 625
All you can do is play with it. At some point you have to say "enough! My barrel doesn't like these bullets as much as I wish it did!" Then load up the 77smk and shoot bug hole groups.
AJC1
Member
You can keep feeding a kid ice cream, but if they hate the flavor your not doing yourself any favors. Hopefully you didn't buy a hundred gallons of that flavor. Possibly the best news is that just about everyone makes 224 bullets. I'm guessing you were looking for a cheap bulk option. Jrb had really good luck with bobs' this is a multi part series
I had a similar experience with the Hornady 68 grain bullets in one of my rifles. Wouldn’t keep 5 shots in an 8” target from 200 yards. I wrote “Suggestion Box” on my scope and shot the few I had left and called it a day.
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MarshallDodge
Member
I have several hundred gallons
My thought was that if it didn't shoot well in the bolt actions, I would run them in the AR.
I took more loads to the range today with the Lone Peak Fuzion, 1:7 24" Krieger. The hope was that the extra barrel length would help with my theory that velocity is the issue. That has yet to be completely proven but initial groups showed a big improvement. No chrono but 6" more barrel is definitely going to provide more velocity.
Top left was my first 5 shot group, including the clean, cold bore, using 24 grains of TAC, 2.260 OAL, CCI 450, LC brass, Lee FCD crimp
The others were either 24.3 or 24.7 of TAC. Some with Starline brass and Federal AR match primers. It was 70°F ambient, the primers still looked great at 24.7, so I will turn this load up another notch to see if a higher velocity node can be found.
AJC1
Member
The load fell apart for me at 24.4. 24 and 24.2 were good. Looks like you were seeing the same.I have several hundred gallons
My thought was that if it didn't shoot well in the bolt actions, I would run them in the AR.
I took more loads to the range today with the Lone Peak Fuzion, 1:7 24" Krieger. The hope was that the extra barrel length would help with my theory that velocity is the issue. That has yet to be completely proven but initial groups showed a big improvement. No chrono but 6" more barrel is definitely going to provide more velocity.
View attachment 1168346
Top left was my first 5 shot group, including the clean, cold bore, using 24 grains of TAC, 2.260 OAL, CCI 450, LC brass, Lee FCD crimp
The others were either 24.3 or 24.7 of TAC. Some with Starline brass and Federal AR match primers. It was 70°F ambient, the primers still looked great at 24.7, so I will turn this load up another notch to see if a higher velocity node can be found.
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hunt127588
Member
- Joined
- Mar 12, 2006
- Messages
- 76
I couldn't get them to group with IMR XBR 8208. I tried them with LeverEvolution and it tightened them up. This was in a 1/8 twist carbine AR. I have also found that they like to be seated deeper to shoot better. I seated them to 2.230 and it started coming together.
