Originally Posted By: SiringoGreg --- have your tried Winchester Small Rifle primers yet? They did give me the highest velocity.
Siringo, I have not found any yet. But I am going to try them as soon as I can . Thanks for the info, I had been on the look out for some. There was a rumor that the new Win SR primers were too soft for use in AR's. I have no idea where that started or where it ends. But I will try some@@
25 DTI 18 inch barrel Heavy Match Contour
Results from chrono sessions did not result in any new revelations! I think Venatic, Siringo and others have covered most of the bases.
Here is what I have gotten.
10-18-12 80 degrees, sunny, but weapon not in direct sunlight
Powder-8208 Primer-Rem7 1/2
Bullet-70 Sie BK
Av Vel-2921 ES-71.40 SD 36.6
AV Vel-3030 ES-55.42 SD-28.01
Primer still round, no swipes.
Velocity okay speedwise but consistency could be better.
Accuracy at 100 yards was about 1 inch.
On this session, I got the 2 in one hole and 1 about 3/4 inch away syndrome.
I tried CFE with 75 grain Vmaxes. loads were form 33 to 34 grains. Velocity topped out at 2812 , with no pressure but velocity too low to interest me.
LeverRevolution 32.5 Grains 100 Grain Sie BT Primer Rem 7 1/2
Av Vel-2781 ES-15.98 SD 11.31
Primer still rounded, and swipes evident. No gain over 32.0 grains.
CFE 32.5 grains with th Sie 100 grain BT
Av Vel- 2718 ES-32.37 SD-16.64
Primer appeared still rounded, but swipes were visible. No gain over 32.0 grains.
Accuracy with both 100 grain loads were excellent. Sub 1 inch.
Powder-BLC2 Primer Rem 7 1/2 Bullet- 100 Horn Spitzer
AV Vel-2632 ES-38.61 SD-21.18
Primers looked good and no swipes.
My goto's are:
LeverRevolution 33.0 grains Rem Primer 90 grain SHPBT
Av Vel- 2900 Accuracy good- deer killing excellent
LeverRevolution 32.0 Grains 100 Grain Nosler Partition or Sie BT Spitzer
AV Vel-2682 ES-11.29 SD 6.40
Have not killed a deer with this one, but it has promise in my mind. I will test it this year.
I keep coming up with this one in my notes where I have marked it with a star due to accuracy and speed. I have shot it over the last year on several occasions with consistent results.
TAC Powder Rem Primer 70 grain BK or 75 Grain VMax
33.7 Grains AV Vel-3061 ES-43.39 SD-22.11
Primers looked ok and no or minimum swipes! It is a coyote killer!!
All cases used were SSA.
I know this isn't ground breaking but hope it helps someone somewhere. I know I have enjoyed working with the DTI. I have other data with 322, Ext, and Benchmark but it was all hohum!
Good Shootin' Guys
Great information Greg!!!! Regarding the swipes ---- as an experiment I installed a regulated gas tube from MGI. With the Leverevolution powder, I eliminated the swipes and can set the action to function in sub zero weather or 80 degree days.
There is not a good selection of adjustable gas blocks for the .875 diameter barrel. I sure wish someone would make an adjustable block similar to Ruger's adjustable piston system --- rather that use allen set screws. YOU HEAR THAT MIKE!!!!!!!!!
My loads are basically what you already came up with. The LR stuff was really good. I will have to try the 80 grain TTSX. It's not that I don't believe your info at all, I just like to play around. 8208 may be the ticket for it. No magic powder , I know, but I can hope.
My barrel is a different countour. Mine is .750 at the gas block then .730 to the muzzle. I asked Mike about last week and he advised he did'nt know if he had room to make them adjustable. But we can help. I have a CS extra strenth buffer spring from,I think JP Enterprises. That may help a little. I may go the adj. block route just cause I can, but I like the 25 DTI written on my gas block, not really a good reason not to change it, I know.
Deer season here opened yesterday but I work weekends and can't try any of the new loads on deer yet!
While working on another upper/caliber, I purchased an adjustable gas block from Wilson combat (.750) carbine length. Unfortunately, it would not fit under Mike's Handguard (their on-line lit was not clear). But I liked it because I could adjust if from the front. I'll save it for another day.
Regarding the 80 grain --- my tests were very limited. It is such a long bullet. BUT if you can get it going 3000 fps ---- GREAT.
Also -- for those that read this forum, the November issue of Shooting Times has a good article on the 250 Savage. Writer used a 22 inch barrel Savage and for the most part was getting the same velocities as the 25 DTI produces. COOL!
Originally Posted By: SiringoAlso -- for those that read this forum, the November issue of Shooting Times has a good article on the 250 Savage. Writer used a 22 inch barrel Savage and for the most part was getting the same velocities as the 25 DTI produces. COOL!
I read the article, it was pretty good. I wish I could duplicate his load with the 80 Grain TTSX. That would be pretty devastating. I am gonna purchase an adjustable bas block, just don't know which one yet. Still looking !
Just got thru doing a little shooting with 8208 and 75 Grain Vmax loaded to 2.29. I found a pressure peak really quick due to poor load testing practices.
I tried 31 grains with ok results, no pressure signs and speed averaging 2880. I got brave and jumped to 31.5 grains and was rewarded with 2921. I got really brave and loaded 32.0. On this load I got an average of 3031. To me that is a heck of a jump and would indicate a spike to say the least!
Even [beeep] I got the 100 fps jump, I loaded up 2 more loads, 32.2. and 32.4. I will try that and see where it goes. Still have not gotten to really try out the new Adj. Gas Block I installed!