Throating for the 300’s

[jasnt]

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 .025” short of my goal depth.  Very surprising how fast it cuts! And yorke’s bushing fit my barrel very snug. Once I cut that I checked with dummy round and started doing .005” jumps which it cut in about 1 revolution.  I may go anther .030-.050” but haven’t 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

[b23]

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.

[Biggerhammer]

I was shooting the 300gr Berger’s. Once I went to the 285gr Hornady’s. I never went back to the Berger’s, the Hornady’s shoot incredibly well and flat crush game. The 230gr ELD-X is a excellent hunting bullets as well.

[jasnt]

I know I’m a bullet snob.  But running the numbers even at 2850 I gain .3 moa of elevation and loose some in wind at 2000 yards.   

[Biggerhammer]

At the distances your shooting the 300gr shines.

[yorketransport]

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.

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.

[jasnt]

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.

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.

[Reidus]

 It's amazing how little material you have to remove to extend the throat.

[jasnt]

Took it out another.035” 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

[Biggerhammer]

Benchmark barrels .338 Edge reamer put me @ 4.060 (COAL) with the Berger 300 Hybrid 15K into the lands and they shoot incredibly well! 

[jasnt]

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?

[hogslayer]

The OTM like them .015 in.  I have the 300 EH shooting good either .003 in or .025 off

[jasnt]

The 250’s liked .015 off but I’m getting some fliers with the 300’s. Going to do a seating depth test this week

[jasnt]

Think I found my load.  .005” off @2715 fps
Es of 11

[b23]

Think I found my load.  .005” off @2715 fps
Es of 11

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

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