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300 PRC

RL25
Lapua virgin brass
Fiocchi LR primers
COAL: 3.68”
24” barrel (new)
13Degrees Celsius
Magneto speed ( verified with a proven load )

73gn 2441
73.5 2475
74 2517
74.5 2512
75 2544
75.5 2573
76 2576
76.5 2594
77 2606 (book max - claimed 2850 using fed 215s)
77.5 2630
78 2649
78.5 2646
79 2693
79.5 2718
80 2736 - ejector stamp

This powder will be shelved for now. Interested if anyone did more work with N570

Interested in hearing more of your various tests/results... as you're one of very few 24" setups...
I have a 24" on a HOWA1500 on the way, with plans to re barrel to 28" ASAP.
G
 
I’m shooting 230 A-Tips with 76.7 grs of RL26 GM215M and Lapua brass at 2930. I tried the 250s but had to seat them to deep into the case. I live in Missouri. I am using the A-Tips because they aren’t to hard to come by over here.
 
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N570 works great with the heavies, a little hard to meter though.
shall we assume the heavy be 250gr, or you simply even the 230gr ATips?
I'm looking at re-barreling to a 28" but in the mean time will be shooting most probably 225ELDM or 230ATips in 24"
be interesting what others experience are with N565 - I'm asking as I can get some locally at a decent price, Powder is scares here... so it will be about picking one, doing load development and trying to stick with it.

My options (availability) are
N565
Hodgdon Retumbo
Hodgdon H1000

for now, 24" - ELDM225 or Tips 230
for later, 28" - ATip 250 - but might totally powder swop then, Could also end with Berger 245 's Hybrids.... never know.

G
 
shall we assume the heavy be 250gr, or you simply even the 230gr ATips?
I'm looking at re-barreling to a 28" but in the mean time will be shooting most probably 225ELDM or 230ATips in 24"
be interesting what others experience are with N565 - I'm asking as I can get some locally at a decent price, Powder is scares here... so it will be about picking one, doing load development and trying to stick with it.

My options (availability) are
N565
Hodgdon Retumbo
Hodgdon H1000

for now, 24" - ELDM225 or Tips 230
for later, 28" - ATip 250 - but might totally powder swop then, Could also end with Berger 245 's Hybrids.... never know.

G

Retumbo might be a little slow, even for the heavier bullets. I relegated my remaining Retumbo to an emergency powder for both my 300 PRC and 37XC. I haven't used 565 - can't get any to play - but I've tried both Retumbo and H1000 in a 28" barrel. Ultimately, I chose neither. RL26 continues to be my favorite, but H1000 tested pretty well when I shot it. 565 should be similar to H1000. Now, all my H1000 is designated for my 37XC - and I need it. The damn thing goes through powder!
 
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shall we assume the heavy be 250gr, or you simply even the 230gr ATips?
I'm looking at re-barreling to a 28" but in the mean time will be shooting most probably 225ELDM or 230ATips in 24"
be interesting what others experience are with N565 - I'm asking as I can get some locally at a decent price, Powder is scares here... so it will be about picking one, doing load development and trying to stick with it.

My options (availability) are
N565
Hodgdon Retumbo
Hodgdon H1000

for now, 24" - ELDM225 or Tips 230
for later, 28" - ATip 250 - but might totally powder swop then, Could also end with Berger 245 's Hybrids.... never know.

G

With the 250 ATips I just haven’t been able to work up a load that will give me better performance inside 2,600 yards.

With the a 230 ATip using RL26 I can get 2940 with an SD around 8. The best I can get out of the 250 is 2860 using LRT powder, giving me SDs around 25. I just haven’t had luck with that powder.
At these speeds the drops on the 230 equals the 250 out to 2,600.

Additionally, the bearing surface of the 250 sticks well below the shoulder / neck junction. Maybe in a barrel with some free bore the 250s would work better.

H1000 worked well in my 300WM shooting 235 ELDMs.
 
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Retumbo might be a little slow, even for the heavier bullets. I relegated my remaining Retumbo to an emergency powder for both my 300 PRC and 37XC. I haven't used 565 - can't get any to play - but I've tried both Retumbo and H1000 in a 28" barrel. Ultimately, I chose neither. RL26 continues to be my favorite, but H1000 tested pretty well when I shot it. 565 should be similar to H1000. Now, all my H1000 is designated for my 37XC - and I need it. The damn thing goes through powder!
Retumbo... bit slow, even in a longer 28" barrel ?

G
 
Retumbo... bit slow, even in a longer 28" barrel ?

G

I couldn't max out the load and get the velocity I wanted.

Caveat: my chamber is a little small, so that obviously impacts this a bit, but I was getting compressed loads (even using a drop tube) before reaching pressure.
 
I think i meant, I
I couldn't max out the load and get the velocity I wanted.

Caveat: my chamber is a little small, so that obviously impacts this a bit, but I was getting compressed loads (even using a drop tube) before reaching pressure.
can understand from what I've been hearing the Retumbo is to slow in a 24" barrel for a heavy 250gr ATip.
but getting the impression from research it's all good in a 28" barrel.
Although I'm getting idea H1000 and N565 is better options.
G
 
I've found h1000 to be the best at keeping single digit ES and SD from day to day. N565 gives a bit more velocity but I'm only interested in the lowest of variations. Current barrel is 31.5" Bart running 230 atips 2820 fps.
 
I think i meant, I

can understand from what I've been hearing the Retumbo is to slow in a 24" barrel for a heavy 250gr ATip.
but getting the impression from research it's all good in a 28" barrel.
Although I'm getting idea H1000 and N565 is better options.
G
My 300-PRC (Barrett MRAD 26" barrel) absolutely LOVES Retumbo (77.4 gn) and Berger 220's. Consistent SD's in the single-digit 5's, and no problem with 1-mile shots. I save my H1000 for my 300-NM and 338-LM.
 
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That's where it most consistant. I could care less about a few fps.
No, I meant that looks slow from what I've read... if you want or need faster, yes now, your choice, just surprised by speed considering the barrel length.
Also surprised as the other threads imply H1000 Fastest... then N565 slower and Retumbo even slower, implying for me in 24" I should go H1000, with a edge case of N565, Been advise Retumbo is to slow for my 24" and will just be blowing unburned powder out the front.
G
 
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still playing with these ideas in head...
been seriously thinking of N565, but then noticed the Vihtavuori numbers listed for N570... and wondering why not rather. Although their numbers are down a 26" barrel, might it be that for my 24" N565 will be better, and for a 26" N570 would be better, moving 28" then I'd look at Retumbo rather.
for now bullet will be 225 ELDM or 230gr A-Tips.
G
 
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still playing with these ideas in head...
been seriously thinking of N565, but then noticed the Vihtavuori numbers listed for N570... and wondering why not rather. Although their numbers are down a 26" barrel, might it be that for my 24" N565 will be better, and for a 26" N570 would be better, moving 28" then I'd look at Retumbo rather.
for now bullet will be 225 ELDM or 230gr A-Tips.
G
Maybe you should try 25" and N568....
 
if anyone has access to Quickload, would be keen to see what it spits out... just having heard about it...
300 PRC
ADG Brass (93.2 gr internal volume/water)
Federal Magnum 215 Large Rifle
Hornady 230gr ATip
24" barrel
Option #1 Vihtavuori N565
Option #2 Hodgson H1000

G


Have you ever tried GRT: https://grtools.de/doku.php

A free piece of software similar to quickloads.
 
I received unpublished load data from Berger's Tech Support guy Bob Blaine (really nice guy) regarding their 220 LRHT & 230 HT using Reloder 26 today.
Hope it's helpful.
Berger_220_LRHT.png

Berger_230_HT.png
 
Reading through this thread and the other 100 page one, I noticed not many people use the 230g SMK. Any specific reason?
They had always done well in my .260 and 6.5. 225’s are obtainable, 230 Bergers are hit and miss, and don’t really want to pay for a-tips.
 
Reading through this thread and the other 100 page one, I noticed not many people use the 230g SMK. Any specific reason?
They had always done well in my .260 and 6.5. 225’s are obtainable, 230 Bergers are hit and miss, and don’t really want to pay for a-tips.

I can't speak for the others here, but A-Tips and Bergers have been available locally, and they have shot well for me, so that's my excuse. The A-Tip has a slightly higher published BC than the SMK, but if you're curious, go for it and report back.
 
I can't speak for the others here, but A-Tips and Bergers have been available locally, and they have shot well for me, so that's my excuse. The A-Tip has a slightly higher published BC than the SMK, but if you're curious, go for it and report back.
I’d like to find the 230 Bergers but I have been un successful. If I don’t find them I might just get some to run the first 100 through the barrel and see what they do.
 
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