Pls remove

Well, all the advice is working. Todays results were promising . Here they are:
Accubonds 140 gr.: powder charge from 44.3 to 46.1, .3 grain increments, average group 1.063" , smallest .734" , largest 1.687".
Hornadys 154 gr. : powder charge 40 to 43 , .5 grain increments , average group 1.034" , smallest .320" , largest 1.984"

The larger groups are likely human influence. The Accubonds had more consistent over all average groups, the Hornadys had a nice consistent spread from large to small to slightly larger. I think I may refine the Hornady load as i used .5 grain increments. The heavier bullet seems like it responded more to powder changes but for the better(IMO). I do have some Swift Scirocco's 150 gr on the way, So i think now that I know the 150+ bullets will tune better , hopefully I can get a load with the Scirocco to have a bonded bullet and nice accuracy. This may be a bad idea, but I think i have a good starting point to get some consistent loads.

Next step after this will be my target/plinking round. But that is another day!!

Any other ideas or words of advice???
 
Last edited:
Why would you not choose to do my very simple and harmless suggestion to you; fold up some paper and put a pressure point under your barrel for a couple of groups?
It appears to me that either you or your rifle, have a problem. I am presuming you are a careful shot, so I blame the rifle.
 
Well from todays results , I am thinking that the tunning of the ammo is having success , With many of todays groups at SUB MOA i am sure thinking that fine tuning is just the answer, I am not knocking your suggestion, but I have never heard of a barrel with pressure points or resting on something can aid in accuracy, once I refine my loads to a point where there is no improvement then i will try your suggestion.

These are also to be hunting rounds, so maybe my expectations are a little to high in the first place.
 
Last edited:
Kelly Timoffee said:
I am not knocking your suggestion, but I have never heard of a barrel with pressure points or resting on something can aid in accuracy,
Click to expand...

Not all barrels like to be free-floated. The pressure pad can change the harmonics enough to make a difference. I would try it, before sending hundreds of bullets downrange chasing a load. The hard part will be getting the right mount of pressure.
 
In the time period that I call the glory years of shooting, from a year or two after WW2 until, fading out, in the 1960s, Bedding of rifle barrels was a common topic. For the average, sporting weight centre fire rifle barrel, it was generally conceded that six pounds of pressure on the front of the barrel was about right. It was common for sporting match shooters to carry a spring scale in their shooting gear, to check their barrel pressure.
 
Just wondering, did you folks see todays results????
Am i missing something here???lol
I don't think the latest test loads were all that terrible.

If i can get those minimum sized groups you figure i should be playin with the barrel??
 
The 140gr Accubonds gave you .734" and the 154gr Hornady gave you .320"....what do you need us to help you with? You have the fine tuning done, work with those loads and see which is most consistent - select the one you prefer, don't mess with the gun - it's not broke, don't fix it.

You are at the point of the experiment known as the conclusion, report back with final results and be proud.
 
Well , have decided on the final load.

Wound up being 150 grain Scirocco @ 2789ft/sec

5 shot group .488" @ 100 yards.

42.8 grains of 760 powder , 2.800" COAL , CCI 200 primer. I did use fire formed brass and collet neck sizer.

Don't think i am gonna do any more tuning at this point, this should do for this hunting season.

Thanks for the help, have picture of the grouping but can't upload it here.
 
I'm glad you found a load, to many people get side tracked or hung up on some component they "want to use" even if the gun is telling them NO. In a Tikka 7mm-08 I am just finished reloading for a friend the best I could do with 5 different powders and 140gr partitions was about 1 1/2" groups, factory ammo was better. Here is my final 5 shot group with the 139gr sst's, it happened to like them on my second powder. Now if I could only get all my rifles to behave like this. Target is 100 meters.

Tikka7-08.jpg
 
I've shot a few hundred 130gr SSTs in my .270win. Tikka T3. From my experience, they are very sensitive to seating depth, and like to be jumped a bit, not close to the lands(if it were even possible to seat them close to the lands.)

In my case, increasing COAL by .020" turns a .6 MOA load into a 2 MOA load.
 
zimbu said:
I've shot a few hundred 130gr SSTs in my .270win. Tikka T3. From my experience, they are very sensitive to seating depth, and like to be jumped a bit, not close to the lands(if it were even possible to seat them close to the lands.)

In my case, increasing COAL by .020" turns a .6 MOA load into a 2 MOA load.
Click to expand...

My Sako A7 in .270 also shoots the 130gr. SST's very well.....I just seat at the maximum lenght that the magazine allows me. Good thing I dont' need to get closer to the lands :D
 
You must log in or register to reply here.
Back
Top Bottom