The definition of overbore or what constitutes as such remains controversial.
(Source: https://bulletin.accurateshooter.com/2014/03/overbore-cartridges-a-working-definition/). The source also has similar posts.
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25PRC or something else?
- Thread starter Sid Post
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- 257 wby 257 weatherby prc saum
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(Source: https://bulletin.accurateshooter.com/2014/03/overbore-cartridges-a-working-definition/). The source also has similar posts.
Have you shot anything with them? Im looking to do the exact same thing but wondering about on game performance
I had the opportunity on a WT doe last year but passed it. @Bghunter338 and @B-LOT Banga have. Hopefully, they will chime in.
What was your load data if you dont mind? Who did the smith work on your rifle? Btw, are you in Great Falls?
My barrel is a McGowen pre-fit that I put together as a DIY project.
The knob was done by Polished Knob in Montana. Yes, I am in Great Falls.
I am nowhere near final on my load development but I was using 67.5g MagPro, with powders I already have opened.
Bghunter338
Well-Known Member
Good morning, like Feenix said I had the opportunity to take a mule deer doe with them last year. My rifle is not a weatherby though, it's a 257 Blackbird very similar in performance without the belt. Don't ask I got a wild hire up my butt and thought it would be cool to have a 257 weatherby with no belt. Now I'm finding it doesn't matter belt or no belt. Anyway I'm shooting 65.4grs of Retumbo and getting 3162 for an average. The bullets shoot very well. The shot on the deer was a head shot at 135yrds so I can't say on a body shot for sure but I think there going to do just fine. PM if you have any questions. Here's a picture of the doe for reference.
So you just bought the prefit and it spun on without issues?
What's the H20 capacity of the Blackbird, BGH338? Appears to be a great performer.
And what bullet are you using at 3142?
And what bullet are you using at 3142?
Bghunter338
Well-Known Member
Looks like 76.251grs. And that's with the 145gr blackhole bullet.
Correct!
I'm a build or 2 away from doing a 25 Max.
Had a couple others jump line in front of it, recently.
Case capacity will be very similar, I would expect performance to be also.
I am considering 28" for it, 26 minimum since a brake won't be used.
Is the Blaser brass readily available? Who makes it if ya don't mind me asking…?
Had a couple others jump line in front of it, recently.
Case capacity will be very similar, I would expect performance to be also.
I am considering 28" for it, 26 minimum since a brake won't be used.
Is the Blaser brass readily available? Who makes it if ya don't mind me asking…?
Bghunter338
Well-Known Member
Mine is on a 26". No I can't seem to find brass anymore and then found out that norma stopped importing it about the same time the prc stared coming out. I was able to at least get 250 pieces while I could. I might have locked in another 300 if the guy ever gets back to me. We shall see. I do all my brass prep if that's what your asking.
Bghunter338
Well-Known Member
I was able to make it out of 300 prc but that was a pain in the ***. Lol 
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