LRH Special in 7RM

Will Ferrell Reaction GIF
 
Is having a more square angle at (N) than a radius (rounded) more of a norm or just not good in the throat/lead? I'm thinking about flow of gas/pressure transition into the barrel. What is the angle of the groove/land from the throat. I think my pt&g uni-throater is at 1.5*?
 
ARlife4me said:
Is having a more square angle at (N) than a radius (rounded) more of a norm or just not good in the throat/lead? I'm thinking about flow of gas/pressure transition into the barrel. What is the angle of the groove/land from the throat. I think my pt&g uni-throater is at 1.5*?
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I look at the 45 degree transition as a wall. I chased a Wylde chamber with my 10 degree "N" reamer. He claimed he gained close to 50 fps. I wasn't there to witness the testing after he received the barrel. I trust his word.

All my reamers are 1 degree 30 at the tip.

Check out Manson's 308 T30, 30 degree transition as opposed to 45. Seems like he and I were playing around with the same concept about the same time.

308 Winchester 2019 Fullbore T30 | Manson Precision Reamers

mansonreamers.com mansonreamers.com
 
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Like all your rifles, I had no doubt the accuracy. Glad you got to take it for a short spin. Once you get a favorite load established, it will be time to get it out for some elk hunting.
 
USAFRet said:
Like all your rifles, I had no doubt the accuracy. Glad you got to take it for a short spin. Once you get a favorite load established, it will be time to get it out for some elk hunting.
Click to expand...

Might be awhile before I do any load work. I have a bag of ADG, but will sideline them. I just ordered 3 boxes of Peterson 7RM Long. Based on my experience on their 300WM long, I just like them.
 
bamban said:
Might be awhile before I do any load work. I have a bag of ADG, but will sideline them. I just ordered 3 boxes of Peterson 7RM Long. Based on my experience on their 300WM long, I just like them.
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With the "long" brass do you chamber to match or just trim as needed?
 
ARlife4me said:
With the "long" brass do you chamber to match or just trim as needed?
Click to expand...

My 300WM reamer is almost a perfect match for the 300WM long. It is a modified A191 reamer. You can discern which is which by looking at the area forward of the belt. One is fired, the other a virgin brass. The load is not slouch, 215 Hybrids 2385 at 500 yards recorded by Shotmarker


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ARlife4me said:
With the "long" brass do you chamber to match or just trim as needed?
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I thought they just have the shoulder out a bit farther to reduce case stretch. I don't think they are longer by length, just have the shoulder out farther to fit the chamber better. I'd see how they fit your chamber and then decide.
 
xsn10s said:
I thought they just have the shoulder out a bit farther to reduce case stretch. I don't think they are longer by length, just have the shoulder out farther to fit the chamber better. I'd see how they fit your chamber and then decide.
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Virgin brass length is just below what most people consider trim length of 2.610 to be the norm.
 

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