45.2 grains of Varget
175 SMKS
CCI BR2
Fed brass
COAL 2.840
Shoots 1/2 MOA or better and running 2670 out of y 18" Oby tube.
175 SMKS
CCI BR2
Fed brass
COAL 2.840
Shoots 1/2 MOA or better and running 2670 out of y 18" Oby tube.
45.2 grains of Varget
175 SMKS
CCI BR2
Fed brass
COAL 2.840
Shoots 1/2 MOA or better and running 2670 out of y 18" Oby tube.
unknown velocity, dont have a chrono..
Nothing wrong with the old fashioned method of "extrapolation". Zero at 100 yards, shoot at 200 with no change in scope setting. Measure drop and repeat at 300, 400, etc until you run out of distance. You'll need some tall targets at the longer range or just put them on a "tomato stake" and set the bullseye at higher distances off the ground.
When you have your "drop chart" then go to JBM ballistics and input various speeds (good guesses work fine here) and see which speed gives you the same "drop chart".
In many ways this is even more accurate than just relying on a Chrono as you now have your Dope card for that ammo and at that point actual speed is just something to talk about. You've corrected for over or understated BC's and rendered the G1 vs G7 argument moot.
I've done that to verify dopes. I get 2705fps inputting off my data card when shooting paper out to 1000 in 100 yard Increments. I don't see my 20" barrel slinging a 185gn pill that fast but it is a semi compressed load with zero pressure signs. I was figuring 2550 or so. I've loaded up to 46.1gn with the same setup and had some pretty noticable primer deformations. It works though and is my go to load now.
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Just remember the words of wisdom in the Bud Lite commercial ---------"It's only weird if it doesn't work".
Well I just got the 400 178 A-MAX's I ordered and loaded up 8 round tonight. I am going to see how they shoot. I will try in my Styer SSG-04 24 inch 1-12 twist first and then if all goes well I will see how the work in the AI-PSR 308 with a 1-10 twist.
Load Data
Federal Brass
CCI BR2 Primer
44.2 or 44.4 Varget
178 A-MAX
2.830 OAL
FPS TBD
So i would be a "noob" to long range shooting but as a gun lover and a student far away from my guns I've had lots of research time so I understand stuff about (some of) the theories, i made this load in the summer for my stock 700 vls (26" barrel 1-12" twist)
Hornady 168gr bthp
42gr benchmark
hornady match .308 brass
federal 210 primers
With that I was getting just under 1/2 moa at 200yrds
I haven't played with seating depths or even types of powder and I'm not all sure where to go from where I'm at....
In terms of OAL should i just seat the bullets out far enough that they just fit in the magazine? I don't think I don't think I can get my bullets that close to my lans on a Rem 700.
As far at bullet seating, my Rem 700 has always shot well without messing with it.
I load my coyote gun (.223) with CFE but I don't see a real need for it in bolt guns. from what ive gathered its basically just cleaner but tempurature will screw with velocities a lot more. tell me what you find! I've got quite a bit of it!
Found a great one yesterday.
42.2 gr IMR-4064
FC Brass (GMM)
175 SMK
Fed GM210M
2.800" OAL
2580 fps avg from 24" bbl.
Group size at 100 Y was .219 MOA. This was shot with an ambient temp of 28 degrees. Wanted a good "Magazine Length" load and it looks like this is it.
Specifically for Savage F/TR. What worked well in my 10BA, not so good in the F/TR. It likes a lot of jump. Just tried this yesterday.
175g SMK
43.5g Varget
Lapua Brass
CCI 200 primer
2710 FPS
2.770 COAL (.020-.030 was all good but .030" was best)
My son was putting holes in holes with this load, was under .5 MOA. Will try next weekend and see how it shoots at 500 yards.
Good to know. I shoot the savage model 10 TR. Thats close to my load.
My load for my Savage:
CCI large rifle BR primers
43.0 gr IMR 4046
Lapua brass
175 gr SMKs
Loaded .010"- 0.015" off the lands.
Have you tried a heavier powder charge with this bullet? Usually, when I see a group shaped like this it needs a little more "speed" to close it up. Your charge is right about the mid-point for IMR-4064 and if you haven't hit pressure signs, you might try a load closer to 44 gr.
With the 11.25 twist rate it leads me to believe that the intended bullet for that rifle is the 175 gr. With a 175 gr your target load would be around 42 gr using 4064.
>1 MOA isn't bad but with some tuning I'll bet you can cut that group in half based on my experience with a similar rifle, that powder, and 175 gr bullets.
Not being critical, just offering some free advice
No worries. Opinions and advice are always welcomed.
I went up to 43.8grs of the IMR-4064. Never saw any pressure sign. The groups seemed to open up a bit the higher loading I went though.
My old Sierra manual lists the max. for this bullet/powder combo as 44.7grs so I have some room to work it.
This is the best load I have been able to come up with after many bullet/powder combinations.
It does not like the 175gr SMKs for some reason. Even the 165gr Hornady SSTs shoot better.
Specifically for Savage F/TR. What worked well in my 10BA, not so good in the F/TR. It likes a lot of jump. Just tried this yesterday.
175g SMK
43.5g Varget
Lapua Brass
CCI 200 primer
2710 FPS
2.770 COAL (.020-.030 was all good but .030" was best)
My son was putting holes in holes with this load, was under .5 MOA. Will try next weekend and see how it shoots at 500 yards.
You may also be seeing a "Jump" issue. Take the best shooting charge weight and play with the OAL's. If you want to shoot "magazine length" cartridges just start at the 2.750" length you used for this load. Load 5 at that length, load 5 more at .005" longer, and repeat until you reach a length about .005" less than the max your magazine will reliably feed. My .308 with 175's shoots "ragged holes" at 100 Y with an OAL of 2.825". Shorter or longer and the groups scatter.
Tuning a load is an "Art". First find a charge weight that shoots best with any given bullet. Then work with the OAL, varying until the group is as small as you can get. Then go back to powder charges only now work in smaller increments. For the Quick Tune use .4-.5 gr increments in a .308. After you've found the smallest group with powder and your first run through of OAL's then go back and use .1-.2 gr increments. This will adjust for the pressure changes caused by varying the seating depth as well as increasing or reducing the jump. I try to do this kind of tuning when the conditions are kind of "right in the middle". Not too hot, not too cold. This helps me develop a nice accurate load for just about any bullet I choose to send down the pipe. Only variations after this kind of tuning is than limited to bullet quality itself.