ALL MY ODCR CUSTOM BUILDS & LOAD WORK-UP

[Bill Norris]

Wanted to kind of catch-up with the thread relating to the 25 X 47 matters. After carefully looking at everything my Buddy, SVT_Tactical and I have seen when going to 300 yd. targets with the 25 X 47 we realized even though we were seeing 5-shot gps. @ 100 yds. back to back drilling 1/4 inch and sometimes less. that we simply were not quite getting the accuracy for B R we were looking for at longer distances and not really understanding why. At this point we are moving back to the cartridges that we know well and have considerable experience in tuning. The 25 x 47 may very well work great for NRL or PRS and maybe some other categories but for now I suppose the 6mm will be our gig. My 6 X 47 is almost ready and I plan to continue this thread with all the loads & data that I work with. At some point in the future we may re-visit the 25 X 47 with a different barrel brand, twist, length, etc. Let me be very clear. There is no reflection or dis-satisfaction with O D C R period. Zack did the same great work on these rifles as he has always done and continues to do..

 

[357Mag]

Wanted to kind of catch-up with the thread relating to the 25 X 47 matters. After carefully looking at everything my Buddy, SVT_Tactical and I have seen when going to 300 yd. targets with the 25 X 47 we realized even though we were seeing 5-shot gps. @ 100 yds. back to back drilling 1/4 inch and sometimes less. that we simply were not quite getting the accuracy for B R we were looking for at longer distances and not really understanding why. At this point we are moving back to the cartridges that we know well and have considerable experience in tuning. The 25 x 47 may very well work great for NRL or PRS and maybe some other categories but for now I suppose the 6mm will be our gig. My 6 X 47 is almost ready and I plan to continue this thread with all the loads & data that I work with. At some point in the future we may re-visit the 25 X 47 with a different barrel brand, twist, length, etc. Let me be very clear. There is no reflection or dis-satisfaction with O D C R period. Zack did the same great work on these rifles as he is has always done and continues to do..

Bill -

Thanx again, for another of your timely & informative updates on that .25” calibre.


With regards,
357Mag

 

[Bill Norris]

Very welcome Sir. Appreciate you.

 

[Tangent]

Bill, I'm starting to think that there is a sweet spot for any given calibre of bullet length, and how much you have to spin them to get the most out of the high BC. It's seems that rarely are the highest BC bullets the most precise. Maybe that's just the physics of it or perhaps we don't have tight enough tolerances to get those high BC, fast spinning bullets to perform? Very interesting results.

 

[Alex Wheeler]

The 25x47 works plenty well for BR. I have numerous guys winning with it. Shawn Williams son shot 3 3" 10 shot groups in a row at the 1k IBS Nats with his which has NEVER been done with any cartridge. His are also shooting great. Thats 2 years in a row it won HG at the IBS Nats. It also shot the smallest 2 gun group agg at the world open. Could be many reasons why you may be struggling. Try different lots of bullets? Different reamer? They are quite picky about neck tension. More so than most. So if you didn't explore that, its worth a shot. But I also understand sticking with what has worked for you before as well.

 

[SVT_Tactical]

The reason these two didn't work were the barrels. Both were CRB blanks. For whatever reason they just opened up at anything over 100. We tried 8 different powders, different primers and all the 130 class .257s available. And when we say opened up, we're talking 1/2-3/4 moa groups, nothing crazy but not enough for BR. ES and SDs were always low, single digit 5 shot groups.

Now the Lilja barrel i had spun using the same reamer.... it's on fire and certainly BR capable and has shown us what we wanted.

I'll get info posted on it ASAP.

 

[DLT]

The reason these two didn't work were the barrels. Both were CRB blanks. For whatever reason they just opened up at anything over 100. We tried 8 different powders, different primers and all the 130 class .257s available. And when we say opened up, we're talking 1/2-3/4 moa groups, nothing crazy but not enough for BR. ES and SDs were always low, single digit 5 shot groups.

Now the Lilja barrel i had spun using the same reamer.... it's on fire and certainly BR capable and has shown us what we wanted.

I'll get info posted on it ASAP.

I guess I’ll never understand exactly how it happens. I have wonder of it was me, conditions, load or barrel how a man can hammer in the 1s and 2s at 100yds but the groups go to pieces at distance.

 

[Tangent]

I guess I’ll never understand exactly how it happens. I have wonder of it was me, conditions, load or barrel how a man can hammer in the 1s and 2s at 100yds but the groups go to pieces at distance.

I wonder if it's like a spinning top? As distance increases the spin rate drops and the "wobble" becomes more exaggerated and groups open up. Maybe...

 

[wasskeet]

Waiting on a 25x47 barrel now. It isn't a CRB - maybe I need to be adding a new Dasher/BRA barrel just in case?

 

[Kracken McGraw]

The reason these two didn't work were the barrels. Both were CRB blanks. For whatever reason they just opened up at anything over 100. We tried 8 different powders, different primers and all the 130 class .257s available. And when we say opened up, we're talking 1/2-3/4 moa groups, nothing crazy but not enough for BR. ES and SDs were always low, single digit 5 shot groups.

Now the Lilja barrel i had spun using the same reamer.... it's on fire and certainly BR capable and has shown us what we wanted.

I'll get info posted on it ASAP.

Is the Lilja barrel that’s shooting a 1-7 twist?

 

[Rick300]

The 25x47 works plenty well for BR. I have numerous guys winning with it. Shawn Williams son shot 3 3" 10 shot groups in a row at the 1k IBS Nats with his which has NEVER been done with any cartridge. His are also shooting great. Thats 2 years in a row it won HG at the IBS Nats. It also shot the smallest 2 gun group agg at the world open. Could be many reamers why you may be struggling. Try different lots of bullets? Different reamer? They are quite picky about neck tension. More so than most. So if you didn't explore that, its worth a shot. But I also understand sticking with what has worked for you before as well.

Do you know what bullets they are using? I have a 25x47 in progress now

 

[SVT_Tactical]

Lilja is 1-7
CrBs were 1-7.5

 

[Bill Norris]

The 25x47 works plenty well for BR. I have numerous guys winning with it. Shawn Williams son shot 3 3" 10 shot groups in a row at the 1k IBS Nats with his which has NEVER been done with any cartridge. His are also shooting great. Thats 2 years in a row it won HG at the IBS Nats. It also shot the smallest 2 gun group agg at the world open. Could be many reamers why you may be struggling. Try different lots of bullets? Different reamer? They are quite picky about neck tension. More so than most. So if you didn't explore that, its worth a shot. But I also understand sticking with what has worked for you before as well.

Oh yea, we tried testing everything as we normally do. We feel there was an issue with the barrels and our testing will certainly continue but with a different barrel manuf. Looks like SVT_Tactical is well on the way in that process. It is definitely something we both want to proceed with once we find barrels that show us we can continue with confidence. Stay tuned as the weather is not co-operating right now.

 

[Bill Norris]

The reason these two didn't work were the barrels. Both were CRB blanks. For whatever reason they just opened up at anything over 100. We tried 8 different powders, different primers and all the 130 class .257s available. And when we say opened up, we're talking 1/2-3/4 moa groups, nothing crazy but not enough for BR. ES and SDs were always low, single digit 5 shot groups.

Now the Lilja barrel i had spun using the same reamer.... it's on fire and certainly BR capable and has shown us what we wanted.

I'll get info posted on it ASAP.

Definitely nothing wrong with the reamer. Too many guys are having great results with it.

 

[Rick300]

The reason these two didn't work were the barrels. Both were CRB blanks

Crap, I bought 2 of them

 

[Bill Norris]

Crap, I bought 2 of them

I hope they work out for u.

 

[rjs1230]

Crap, I bought 2 of them

I bought 1 Zack has it now 30 br . I bore scoped it was not impressed . We will see .

 

[SVT_Tactical]

I bought 1 Zack has it now 30 br . I bore scoped it was not impressed . We will see .

If he hasn't started it I would switch... I'm not impressed. In total I've got experience now with 3, these two and another that I've relegated to a forming barrel.

 

[Rick300]

I bought 1 Zack has it now 30 br . I bore scoped it was not impressed . We will see .

Hmm, I think I will borescope mine

 

[rjs1230]

Hmm, I think I will borescope mine

I have never had a custom barrel with chatter marks this one did . I don't know if that would make a difference . I thought lapping is supposed to take them out .