MY 25 X 47 LAPUA BUILD & LOAD WORK-UP

[Rick300]

Yeah, I want to be like Bill when I grow up

 

[Bill Norris]

Bill -

Howdy !

Another build, this one a 1-10 ?!

GO Bill GO !!


With regards,
357Mag

Yes Sir. It's on the table for sure. I have to keep one waiting all the time. Cannot lose my place in line. Thanks for the GO word. LOL.

 

[Bill Norris]

Yeah, I want to be like Bill when I grow up

Well, you may not be too happy if you turn out like me. But I keep trying no doubt.

 

[tom]

Bill,

Maybe the 540 will be great for you, but definitely don't overlook Varget also. I know @GlennK had 4350 and 540 over 3000, but when he won heavy gun at the 1,000 yard nationals last year, it was Varget at just over 2900 I think. Mine got me pretty far this year in light gun on the Varget just over 2900 also, but did start fouling at about 900 so I pulled it.

Tom

 

[Bill Norris]

Bill,

Maybe the 540 will be great for you, but definitely don't overlook Varget also. I know @GlennK had 4350 and 540 over 3000, but when he won heavy gun at the 1,000 yard nationals last year, it was Varget at just over 2900 I think. Mine got me pretty far this year in light gun on the Varget just over 2900 also, but did start fouling at about 900 so I pulled it.

Tom

Thanks Tom, Oh yea, I am playing with that idea too. Did a preliminary look and it don't look bad at all.

 

[Alex Wheeler]

2 in the top 5 at the World Open on a .25 and varget also. Lowitz and Maxson. Maxson had the best group agg. of the match.

 

[Bill Norris]

2 in the top 5 at the World Open on a .25 and varget also. Lowitz and Maxson. Maxson had the best group agg. of the match.

Thanks Alex great info.

 

[357Mag]

Yes Sir. It's on the table for sure. I have to keep one waiting all the time. Cannot lose my place in line. Thanks for the GO word. LOL.

Bill -

Howdy, again !

A notional “ .25 -47L “ wildcat would have case capacity fairly close to the old tymee
.250-3000.

The. 22” M-77 .250-300 I had back in the latter -70s, featured a 1-10 twist.
We used it on NE Indiana groundhog. Shooting the Sierra 75HP, the thing was a death ray out to 375-385yd, the longest range we got to apply it at. It would have been fun to have one w/ the 24” barrel !

We shot the 75HPs over 39gr H-380 and FED LR Match. My best friend produced the first “ one-hole “ 5- shot 100yd group either of us had ever shot…. back in 1977….
shooting that M-77 “ Red Butt “. The Canjar single set trigger I put on the gun… which helped a bunch w/ shooting small-er.

I note that H-380 is separated from VV 540 on Hodgdon’s “ burn rate “ chart by just one
powder. I find that interesting, as VV500 series powders have been touted as best used when shooting “ heavy-for-calibre “ bullets…. while ( for us ) H-380 made the light 75gr HPs really sing.

Please do keep us posted on your exploits Bill !
I very much enjoy your contributions made here !

Best of luck in your endeavors !


With regards,
357Mag

 

[Bill Norris]

Bill -

Howdy, again !

A notional “ .25 -47L “ wildcat would have case capacity fairly close to the old tymee
.250-3000.

The. 22” M-77 .250-300 I had back in the latter -70s, featured a 1-10 twist.
We used it on NE Indiana groundhog. Shooting the Sierra 75HP, the thing was a death ray out to 375-385yd, the longest range we got to apply it at. It would have been fun to have one w/ the 24” barrel !

We shot the 75HPs over 39gr H-380 and FED LR Match. My best friend produced the first “ one-hole “ 5- shot 100yd group either of us had ever shot…. back in 1977….
shooting that M-77 “ Red Butt “. The Canjar single set trigger I put on the gun… which helped a bunch w/ shooting small-er.

I note that H-380 is separated from VV 540 on Hodgdon’s “ burn rate “ chart by just one
powder. I find that interesting, as VV500 series powders have been touted as best used when shooting “ heavy-for-calibre “ bullets…. while ( for us ) H-380 made the light 75gr HPs really sing.

Please do keep us posted on your exploits Bill !
I very much enjoy your contributions made here !

Best of luck in your endeavors !


With regards,
357Mag

Absolutely we plan to keep the thread updated as we progress thru the development and successful use of the rifle. Hope to assist other new 25 X 47 owners to sort thru components as there is hardly any info out there. I believe this cartridge will give an edge to long range shooters due to the high B C bullets and especially if chambered with this reamer. Appreciate your contribution and comments to the fullest.

EDIT: We are looking at the Hornady 134 gr. ELD-M bullet to see exactly where it will tune along side of the Berger 135 gr. LRHT as well. Will post data once the testing is complete. Not sure of the Sierra 131 gr. M K as Sierra now have them back in their procession to check with their equipment and decide what action they need to take to correct the random ogive placement on the profile. So, we will see what they say soon I suppose.

 

[Bill Norris]

Between showers finished the front-end of load development (POWDER & SEAT DEPTH) with the Hornady 134 gr. ELD-M yesterday to find it will tune with VV-N540 but a little slower than the Berger 135 gr. LRHT and grouped just under 1/2 " @ 100 yds. without turning the tuner. No surprise at slower speeds as the Hornady bullet has a longer bearing surface which in theory should produce more drag. May go back at some point and fine tune powder & seat depth and turn the tuner a few marks to see what that looks like but for now probably concentrate on the Berger 135 gr.

CAUTION - THIS LOAD WILL REQUIRE THE ODCR REAMER TO AVOID HIGH PRESSURE

134 GR. HORNADY ELD-M 2.126 O M 2.905 COL T/L B S .506 B C .645
POWDER VV-N540 37.9 GR. PRIMER CCI 450 .281 BU.
SEATED @ 2.116 O M 2.895 COL .010 OTL
10-SHOT 2897 FPS AVG. 7 E S 3 S D 07/23/25

 

[Bill Norris]

2 in the top 5 at the World Open on a .25 and varget also. Lowitz and Maxson. Maxson had the best group agg. of the match.

Wonder which bullet either of those guys were shooting in that World Open Match? Anybody have a clue or how to find that info?

 

[Mlow]

Wonder which bullet either of those guys were shooting in that World Open Match? Anybody have a clue or how to find that info?

Bill we are both shooting 133 Bergers

 

[Bill Norris]

Bill we are both shooting 133 Bergers

Thank you Sir very much for the info.

 

[B23]

134 GR. HORNADY ELD-M 2.126 O M 2.905 COL T/L B S .506 B C .645
POWDER VV-N540 37.9 GR. PRIMER CCI 450 .281 BU.
SEATED @ 2.116 O M 2.895 COL .010 OTL
10-SHOT 2897 FPS AVG. 7 E S 3 S D 07/23/25

If I'm reading this correct you're seating them 10 thou. off of touch, correct?

I may be slightly closer, I'll have to look, but if I recall that's about where I'm at in my 25 RSAUM w/134 ELD-M also. I know they weren't seating depth sensitive at least they weren't for me which is always nice but then again it seems a lot of these newer bullets aren't seating depth sensitive like some of the old VLD's were. Not sure if that has more to due with these newer bullets or maybe a combination of bullet profile and lead angle/throat design of the reamers being used now days. Regardless of which or what it is I'm just glad things aren't so seating depth sensitive like some used to be.

 

[Bill Norris]

If I'm reading this correct you're seating them 10 thou. off of touch, correct?

I may be slightly closer, I'll have to look, but if I recall that's about where I'm at in my 25 RSAUM w/134 ELD-M also. I know they weren't seating depth sensitive at least they weren't for me which is always nice but then again it seems a lot of these newer bullets aren't seating depth sensitive like some of the old VLD's were. Not sure if that has more to due with these newer bullets or maybe a combination of bullet profile and lead angle/throat design of the reamers being used now days. Regardless of which or what it is I'm just glad things aren't so seating depth sensitive like some used to be.

Yes Sir, that is correct. I think you hit the nail on the head with the combination of bullet profile and lead angle/throat design of the reamer. The lesser angle has proven to be much better and bullet profiles are more rifle/lands entry friendly now a days.

 

[B23]

Yes Sir, that is correct. I think you hit the nail on the head with the combination of bullet profile and lead angle/throat design of the reamer. The lesser angle has proven to be much better and bullet profiles are more rifle/lands entry friendly now a days.

I remember years ago they had some kind of secret sauce 3° lead angle thing for the 222's I don't know maybe others did as well but I remember it more with the triple deuce's using that for some reason. I think most everyone has pretty much adopted 1° as the "norm" now though.

 

[Alex Wheeler]

The 1 degree thing has been blown way out of proportion, and Im probably why. But I said from day one its not that special. Same with the different styles of bore rider throats. I first tried a 1 degree back in 2016 or so in a dasher. Throats washed out too fast. Weirdness started too early. Had to get off it. And it really doesnt gain any speed. I use a 1 degree on one reamer and thats it.

 

[B23]

The 1 degree thing has been blown way out of proportion, and Im probably why. But I said from day one its not that special. Same with the different styles of bore rider throats. I first tried a 1 degree back in 2016 or so in a dasher. Throats washed out too fast. Weirdness started too early. Had to get off it. And it really doesnt gain any speed. I use a 1 degree on one reamer and thats it.

Then is your "go to" a 1.5° or is it one of those proprietary things where if you told me you'd have to kill me deals? J/K and if you don't want to say I understand just curious is all.

 

[nakneker]

Stock made it home on the UPS bus without incident thankfully. As usual, Brett's work is fantastic. Thanks Bro for another job well done. I think the 25 X 47 Lapua is a happy camper now. On to the next one asap.

The stock looks fantastic and your cleanliness gets a gold star!

 

[Bill Norris]

The stock looks fantastic and your cleanliness gets a gold star!

Well thank you very much for the kind words Bro. I try to keep it clean and everything in it's place. If not I cant find anything when I need it. LOL.