190g SMK's with a 1:12"??
- Thread starter nhassey48
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Re: 190g SMK's with a 1:12"??
It may or may not I used to shoot them in a 12 twist at 300' above sea level and during the summer. I suspect it would not have worked so well in the winter.
I would just stick with 175s or go the other direction and shoot 155 scenars. They will shine in a 1-12.
It may or may not I used to shoot them in a 12 twist at 300' above sea level and during the summer. I suspect it would not have worked so well in the winter.
I would just stick with 175s or go the other direction and shoot 155 scenars. They will shine in a 1-12.
Re: 190g SMK's with a 1:12"??
I;m interested to see if the 1 and 12 twist will stabilize the new Hornady 178 Superperformance. They its about 100-200 fps faster but with no increase in pressures so I wonderif the more fps it has, will it stabalize it. I was thinking for the average 1 and 12 .308 about 180 grains was the limit. I mean it might if it was a pretty fast handload? Hopefully I don't hi-jack the threa with the Hornady question and if I did my apologies.
I;m interested to see if the 1 and 12 twist will stabilize the new Hornady 178 Superperformance. They its about 100-200 fps faster but with no increase in pressures so I wonderif the more fps it has, will it stabalize it. I was thinking for the average 1 and 12 .308 about 180 grains was the limit. I mean it might if it was a pretty fast handload? Hopefully I don't hi-jack the threa with the Hornady question and if I did my apologies.
Re: 190g SMK's with a 1:12"??
One thing to keep in mind, I wouldn't test that with a suppressor on your barrel. Even though you may get some decent groups on paper downrange with load development, I'm not sure I'd risk a baffle strike to do it - eventually you'd probably get one.
One thing to keep in mind, I wouldn't test that with a suppressor on your barrel. Even though you may get some decent groups on paper downrange with load development, I'm not sure I'd risk a baffle strike to do it - eventually you'd probably get one.
Re: 190g SMK's with a 1:12"??
Here is what RSI has to say. I've shot them out of a 1 in 12 and had great results so the graph below isn't gospel. Good advice not to shoot them with a suppressor!
-- GYROSCOPIC ANALYSIS DATA --
Muz. Mach Twist Gyro Stability Min. Min.
Vel. No. RPM factor Index Twist RPM
4000 3.58 240000 1.29 86 11.1 258872
3750 3.36 225000 1.28 85 11.1 243513
3500 3.14 210000 1.27 85 11.0 228138
3250 2.91 195000 1.26 84 11.0 212757
3000 2.69 180000 1.25 83 10.9 197380
2750 2.46 165000 1.23 82 10.9 182028
2500 2.24 150000 1.21 81 10.8 166724
2250 2.02 135000 1.19 79 10.7 151511
2000 1.79 120000 1.16 77 10.6 136456
1750 1.57 105000 1.12 75 10.4 121677
1500 1.34 90000 1.05 70 10.1 107387
1350 1.21 81000 1.00 67 9.8 99251
1200 1.08 72000 0.93 62 9.5 91396
1150 1.03 69000 0.93 62 9.4 87829
1100 0.99 66000 0.58 39 7.5 105755
1050 0.94 63000 0.68 45 8.1 93767
1000 0.90 60000 0.78 52 8.6 83463
950 0.85 57000 0.83 55 8.9 76458
900 0.81 54000 0.87 58 9.2 70797
800 0.72 48000 0.92 61 9.4 61262
700 0.63 42000 0.95 63 9.5 52796
600 0.54 36000 0.97 65 9.6 44838
500 0.45 30000 0.98 65 9.7 37136
Here is what RSI has to say. I've shot them out of a 1 in 12 and had great results so the graph below isn't gospel. Good advice not to shoot them with a suppressor!
-- GYROSCOPIC ANALYSIS DATA --
Muz. Mach Twist Gyro Stability Min. Min.
Vel. No. RPM factor Index Twist RPM
4000 3.58 240000 1.29 86 11.1 258872
3750 3.36 225000 1.28 85 11.1 243513
3500 3.14 210000 1.27 85 11.0 228138
3250 2.91 195000 1.26 84 11.0 212757
3000 2.69 180000 1.25 83 10.9 197380
2750 2.46 165000 1.23 82 10.9 182028
2500 2.24 150000 1.21 81 10.8 166724
2250 2.02 135000 1.19 79 10.7 151511
2000 1.79 120000 1.16 77 10.6 136456
1750 1.57 105000 1.12 75 10.4 121677
1500 1.34 90000 1.05 70 10.1 107387
1350 1.21 81000 1.00 67 9.8 99251
1200 1.08 72000 0.93 62 9.5 91396
1150 1.03 69000 0.93 62 9.4 87829
1100 0.99 66000 0.58 39 7.5 105755
1050 0.94 63000 0.68 45 8.1 93767
1000 0.90 60000 0.78 52 8.6 83463
950 0.85 57000 0.83 55 8.9 76458
900 0.81 54000 0.87 58 9.2 70797
800 0.72 48000 0.92 61 9.4 61262
700 0.63 42000 0.95 63 9.5 52796
600 0.54 36000 0.97 65 9.6 44838
500 0.45 30000 0.98 65 9.7 37136
Re: 190g SMK's with a 1:12"??
I tried 190gr out of my sps varmint in 308 win and couldn't hit paper at 50yards.
I tried 190gr out of my sps varmint in 308 win and couldn't hit paper at 50yards.
Re: 190g SMK's with a 1:12"??
My 1/12 308 (Rem factory bbl) shoots well with the 190s, and the 208s and 210s.
My 1/12 308 (Rem factory bbl) shoots well with the 190s, and the 208s and 210s.
Re: 190g SMK's with a 1:12"??
The 190 SMK worked in my Stock Remington Varmit with a 1X12 twist(measured it). 2610fps max dev 9fps with 43.5 gr Varget for 10 rnds; grouped 5/8" @ 200 yds. This bullet was still jumping about .070 even after setting them out as far as I'm comfortable with.
Thought I'd like to have somthing that worked a bit better for mag-legnth rounds and had the barrel set back. Haven't had a chance to really work that out yet but I'm betting that load is way too hot now. Need to get to work on that when I get a chance.
Shot these in a match @ 1,000. Guy beside me was shooting the 185gr Bergers, shooting about half-min inside all my shots.
Still wondering if the 185gr Berger's will shoot in it. Have some coming that I won, will see....
The 190 SMK worked in my Stock Remington Varmit with a 1X12 twist(measured it). 2610fps max dev 9fps with 43.5 gr Varget for 10 rnds; grouped 5/8" @ 200 yds. This bullet was still jumping about .070 even after setting them out as far as I'm comfortable with.
Thought I'd like to have somthing that worked a bit better for mag-legnth rounds and had the barrel set back. Haven't had a chance to really work that out yet but I'm betting that load is way too hot now. Need to get to work on that when I get a chance.
Shot these in a match @ 1,000. Guy beside me was shooting the 185gr Bergers, shooting about half-min inside all my shots.
Still wondering if the 185gr Berger's will shoot in it. Have some coming that I won, will see....
Re: 190g SMK's with a 1:12"??
Dude, you don't know until you have tried it. I shoot 208 AMAX bullets out of my AIAW 308 at 1:12" twist. It stabilizes just fine out to 1K easily. Haven't tried further.
People say that a 105 grains bullet for the 243 win requires a 1:8" twist. I am shooting it out of my stock Remy 1:9.25 barrel and get sub MOA with it. Bottom line is I would just try it. Get one box and test it. Worst case is you get to shoot a bunch of rounds down range (Some how, I don't think you find any objection to that!). If it works great, you have a load that has good BC projos. If it doens't work, well you can try different projos. JMHO.
Dude, you don't know until you have tried it. I shoot 208 AMAX bullets out of my AIAW 308 at 1:12" twist. It stabilizes just fine out to 1K easily. Haven't tried further.
People say that a 105 grains bullet for the 243 win requires a 1:8" twist. I am shooting it out of my stock Remy 1:9.25 barrel and get sub MOA with it. Bottom line is I would just try it. Get one box and test it. Worst case is you get to shoot a bunch of rounds down range (Some how, I don't think you find any objection to that!). If it works great, you have a load that has good BC projos. If it doens't work, well you can try different projos. JMHO.
Re: 190g SMK's with a 1:12"??
Like people have been posting my AI AW 1/12 shoots them well, same for 185 Lapua and 155 Lapua. Nothing like shooting them to answer the question.
Like people have been posting my AI AW 1/12 shoots them well, same for 185 Lapua and 155 Lapua. Nothing like shooting them to answer the question.
Re: 190g SMK's with a 1:12"??
1lnbrdg,
what brass and primer are you using?
ive tried the 190 smk's with imr3031 and imr4064 and it shots ok in my 1-12 sps varmint
1lnbrdg,
what brass and primer are you using?
ive tried the 190 smk's with imr3031 and imr4064 and it shots ok in my 1-12 sps varmint
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