- Thread starter Vamike9
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Neatly done Mr. Steel! What bullet is that? Presume that is a 300 PRC case.
Like the fat cigar in the pic.
Do you have to remove the bolt to extract a loaded round? Any other impracticalities?
285 badlands
To drop a loaded round I just drop the magazine.
It runs pretty well.
No issues.
13ish mils to 1800 and 33ish to 2980 is nothing to sneeze at.
You may want to compare the performance of the lighter solids as well as with the additional speed it could be a better option.
To drop a loaded round I just drop the magazine.
It runs pretty well.
No issues.
13ish mils to 1800 and 33ish to 2980 is nothing to sneeze at.
You may want to compare the performance of the lighter solids as well as with the additional speed it could be a better option.
Ahh... So a 285 gn 338 bullet, with a G1 BC of 1.01. [... hard to make out the scale from the photos.] Thanks for sharing.
It seems we are in the middle of a technology race. Fascinating to watch, but soon we will all need new barrels with faster twist rate.
I noticed their heaviest 416 “ICBM” bullet has a BC of 1.2... Wow!!
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Mark and Sam in Australia actually found that they could get better speeds in a properly throated 300WM than a 300 prc with 230+ class bullets
Would you say that picture is an apples to apples comparison?
Wrong!
This is what my COAL is with my 0.050" throated Win Mag (3.600" chamber), and I would say that my 300 Win Mag is pretty much a belted PRC now that I have a throated match barrel.
I will add, that if I did not have dies and brass already for the 300WM, I would have gone the 300 PRC route. 300 PRC is nothing more than a modern version of 300WM, like the 375 Ruger is to the 375 H&H (Which sadly never took off). But unlike the 375 Ruger, it is here to stay. I also think that as more modern powders come out from the manufactures, the faster you will see them go with heaver bullets.
One last thing, if you are going to build a modern 300WM, I would go with a 3.600" chamber minimum. It will let you load the 208's to 245's long, which is fine for most people. If you're going to shoot the monolithic style of bullets, I would go with a 3.700" chamber minimum so you can run them long as possible and get the most out of them. I would also go with a CIP (3.850") length magazine minimum, as it will let run them out as fer as posable, and this also applies to 300 PRC as well for magazine length. For twist rate, I went with a 1:9 since I am only looking at shooting the 208 to 220 bullets, but I would not hesitate to go the same twist as 300 PRC, winch is 1:8.
Bottom line, you cannot go wrong with ether choice.
Factory Saami freebore on 300 win mag is basically 0 burying any bullets well into the case
Match chambers vary but the .140 freebore was pretty common before the super heavies became popular but that one would be excellent with 190-240 class solids
The other more modern 300WM chamber is a .230 freebore similar to PRC and Norma magnum for 215+ cup/core bullets and it will do everything the prc will do but at a longer OAL
Resurrecting an older thread due to relevance of my question.
The range I go to is moving and is slated to expand to have a 1600 yard range area. I’m very slightly considering building a 300 magnum based rifle to use.
If a person was starting with no reloading supplies, doesn’t want to reload (BTDT), and wants decent factory or semi-factory options off the shelf, which of the two chamberings are better suited for the task?
At most, this rifle would see 3-4 range sessions per year, or probably 300 rounds per year. Not to concerned with barrel life considering each trigger pull will cost $2-3.
Again, this is theoretical as I’d probably spend a year or two maxing out the distance of my 556 gasser first.
The range I go to is moving and is slated to expand to have a 1600 yard range area. I’m very slightly considering building a 300 magnum based rifle to use.
If a person was starting with no reloading supplies, doesn’t want to reload (BTDT), and wants decent factory or semi-factory options off the shelf, which of the two chamberings are better suited for the task?
At most, this rifle would see 3-4 range sessions per year, or probably 300 rounds per year. Not to concerned with barrel life considering each trigger pull will cost $2-3.
Again, this is theoretical as I’d probably spend a year or two maxing out the distance of my 556 gasser first.
Not even close, 300 PRC.
Can you or another go into specifics as the why?
I have both, and given the qualifier that I shoot both single shot only, they both preform almost the same. I load the WM with 225 ELDMs at 2960 at almost 3.7”. I load the PRC with 230 A-Tips at around 2950.
The reason I built the PRC was to get a faster twist so I could shoot the 250 A-Tips. I ended up using the 230 because I’m just not getting the velocity with the 250s to make a difference.
I’ve shot the WM to 2,000 and the PRC to 2,500. With the WM loaded long they are very close in performance.
Some people don’t like the belt on the WM. Doesn’t bother me.
The reason I built the PRC was to get a faster twist so I could shoot the 250 A-Tips. I ended up using the 230 because I’m just not getting the velocity with the 250s to make a difference.
I’ve shot the WM to 2,000 and the PRC to 2,500. With the WM loaded long they are very close in performance.
Some people don’t like the belt on the WM. Doesn’t bother me.
That was me, back in 2021. I've been shooting both my MPA 300-WM and my Barrett MRAD 300-PRC since then, and I can tell you that for me, they both shoot straight and true, and I can hit a 2'x2' one mile steel plate with either one. By my experiences, hand-loading and shooting, the results are VERY similar and both give me long-range accuracy and single-digit SD's. Here are my two best recipe's for each. Retumbo works best, but I have used H1000 as well with solid results
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Its all been laid out in this thread. As soon as you specify long range and factory ammo, these two cartridges aren't very comparable. Only reason anyone should ever pick a 300 WinMag for long range is if they are already invested in the cartridge.
Thanks, thats what I was figuring after reading everything. I assumed the WM factory loading were geared more towards hunting and the PRC loaded to the target end of things.
Look into the berger 300 PRC offerings. They load the 205 and 245(.413 G7) elite hunters.
Thanks for the lead @Supersubes
It’ll be a year or three (if ever) before this project can take off due to other more practical needs. But its nice to see direction my thoughts should go once I do.
Big issue is these rifles are not cheap once you factor in rifle, optic, ammo, mags, and associated periphery equipment.
It’ll be a year or three (if ever) before this project can take off due to other more practical needs. But its nice to see direction my thoughts should go once I do.
Big issue is these rifles are not cheap once you factor in rifle, optic, ammo, mags, and associated periphery equipment.
