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Author Topic: Throating for the 300ís  (Read 1723 times)

Online jasnt

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Throating for the 300ís
« on: May 20, 2019, 04:19:18 PM »
Last night the .338 throat reamer showed up.   I had a little time so I pulled my barrel on the 338/375 XL and set up the ptg uni-throater about .025Ē short of my goal depth.  Very surprising how fast it cuts! And yorkeís bushing fit my barrel very snug. Once I cut that I checked with dummy round and started doing .005Ē jumps which it cut in about 1 revolution.  I may go anther .030-.050Ē but havenít decided  yet.  Boat tail/ bearing junction is right at the bottom of the neck. 

Before doing this I could shoot the 300gr EH @2650 before preasure signs
Today I did a quick preasure test and got preasure at 2800 and stiff bolt lift at 2830
Looks like my node will be 2750ish

More to come
243Round ct. 624
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2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline b23

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Re: Throating for the 300ís
« Reply #1 on: May 20, 2019, 04:47:17 PM »
I know you've told me you're no particular fan of Hornady bullets, but I think the 285gr ELD-M would suit your cartridge really well.  I bet you could get an extra 75-100fps with the 285 ELD-M over the 300 Bergers and those 285's even have a slightly better BC.

Offline Biggerhammer

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Re: Throating for the 300ís
« Reply #2 on: May 20, 2019, 05:57:02 PM »
I was shooting the 300gr Bergerís. Once I went to the 285gr Hornadyís. I never went back to the Bergerís, the Hornadyís shoot incredibly well and flat crush game. The 230gr ELD-X is a excellent hunting bullets as well.

Online jasnt

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Re: Throating for the 300ís
« Reply #3 on: May 20, 2019, 06:29:14 PM »
I know Iím a bullet snob.  But running the numbers even at 2850 I gain .3 moa of elevation and loose some in wind at 2000 yards.   
« Last Edit: May 20, 2019, 07:38:55 PM by jasnt »
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline Biggerhammer

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Re: Throating for the 300ís
« Reply #4 on: May 20, 2019, 06:55:26 PM »
At the distances your shooting the 300gr shines.

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Re: Throating for the 300ís
« Reply #5 on: May 20, 2019, 08:30:24 PM »
Sorry it took me like a week to get that in the mail to you! It's crazy how fast you can go from no freebore to a Weatherby style freebore the length of an air strip with one of those throating tools. :chuckle:

I've been tempted to take the throating reamer to my 338/375 Ruger pistol, but I just can't convince myself to do it.
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Online jasnt

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Re: Throating for the 300ís
« Reply #6 on: May 20, 2019, 09:20:45 PM »
Sorry it took me like a week to get that in the mail to you! It's crazy how fast you can go from no freebore to a Weatherby style freebore the length of an air strip with one of those throating tools. :chuckle:

I've been tempted to take the throating reamer to my 338/375 Ruger pistol, but I just can't convince myself to do it.
thank you again for sending it.
It does look crazy long, and plenty of room to chase.
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline Reidus

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Re: Throating for the 300ís
« Reply #7 on: May 20, 2019, 09:51:23 PM »
 It's amazing how little material you have to remove to extend the throat.

Online jasnt

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Re: Throating for the 300ís
« Reply #8 on: May 21, 2019, 07:55:10 PM »
Took it out another.035Ē tonight
Coal is 3.990 and bto @15k off is 3.050.   Hopefully get a smooth load at 2800 With out beating up the brass
Left to right
New coal, old coal, mag fed coal
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline Biggerhammer

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Re: Throating for the 300ís
« Reply #9 on: May 21, 2019, 08:56:11 PM »
Benchmark barrels .338 Edge reamer put me @ 4.060 (COAL) with the Berger 300 Hybrid 15K into the lands and they shoot incredibly well! 

Online jasnt

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Re: Throating for the 300ís
« Reply #10 on: May 21, 2019, 09:37:09 PM »
Benchmark barrels .338 Edge reamer put me @ 4.060 (COAL) with the Berger 300 Hybrid 15K into the lands and they shoot incredibly well! 
hows the 375 bme coming along?
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline hogslayer

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Re: Throating for the 300ís
« Reply #11 on: May 23, 2019, 05:50:02 PM »
The OTM like them .015 in.  I have the 300 EH shooting good either .003 in or .025 off

Online jasnt

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Re: Throating for the 300ís
« Reply #12 on: May 23, 2019, 07:03:29 PM »
The 250ís liked .015 off but Iím getting some fliers with the 300ís. Going to do a seating depth test this week
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Online jasnt

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Re: Throating for the 300ís
« Reply #13 on: May 24, 2019, 09:01:34 PM »
Think I found my load.  .005Ē off @2715 fps
Es of 11
243Round ct. 624
338rc 747
2019 Rifle rc 494

The commission shall attempt to maximize the public recreational game fishing and hunting opportunities of all citizens, including juvenile, disabled, and senior citizens.
https://apps.leg.wa.gov/RCW/default.aspx?cite=77.04.012

Offline b23

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Re: Throating for the 300ís
« Reply #14 on: May 24, 2019, 10:29:51 PM »
Think I found my load.  .005Ē off @2715 fps
Es of 11

You can try, but I think it'll be pretty hard to improve on that.  Well done!  :tup:

Any of the guns I shoot Berger bullets in have always shot their best right around the 5 thou off mark.

 


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