338-300 PRC... Sherman Improved!

Little bit of practice today. Positional training with the Hatch Bipod in prone/sitting/kneeling/standing as well as using my pack & bags for rear supports. I'm pretty surprised how manageable the system is at sub 9 lbs but also low power. Most of the practice with the NXS 2.5-10x42 scope was at 5x.


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These just came in, the new Hammer 210 gr HHT bullets. I was hoping they would come out with more 338 options, and lighter ones in the HHT line! This particular model falls right into the same category of bullets I set this rifle up for. The bearing surface is almost identical to the 225 AB, 230 ELDX, 250 EH & SMK options.

210 HHT vs 225 AB below:

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That's a sweet looking rifle. Got me thinking.

What is the Benchmark "light magnum" contour? I see numbers, but not that one. Just curious as I have a Bartlein Sendero on one now and not wanting to know the spacing in the channel.
 
That's a sweet looking rifle. Got me thinking.

What is the Benchmark "light magnum" contour? I see numbers, but not that one. Just curious as I have a Bartlein Sendero on one now and not wanting to know the spacing in the channel.

Here's a pic with specs below. The "Light Magnum" is a contour that Travis at TS gets turned by Benchmark. It will fit in the same channel as a Benchmark "Sendero Light" also.

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Little update on 210 HHT's, went out and got some baseline numbers and found pressure etc...

210 HHT pressure ladders:

H4350
78 - 2998
79 - 3029
80 - 3056
81 - 3080
82 - 3135 - possible faint bolt click
83 - Discontinued

N550
75 - 3045
76 - 3083
77 - 3126
78 - 3157 - Hard bolt click, slightly heavier bolt lift
79 - Discontinued

H4350 Notes: 80 gr is a full case, 81 is nearly compressed but can still hear some kernels bouncing around. 82 & 83 gr are compressed & changed seating depth. Not completely sure I hit pressure on this one as I stopped before anything diffinitive. I am not a fan of compressed or high case fill when it starts messing with seating depth consistency. Will shoot 80/81 gr for groups.

N550 Notes: Hit pressure alot sooner than expected. It produces nearly the same speed as H4350 with 5 gr less powder charge. Definitely found pressure at 78 gr. 77 gr is on the fringe of pressure with the slight velocity spike. Will shoot 75/76/77 gr for groups.

Going to go load a few more and see how they group!
 
Initial results with the 210 HHT's are dang impressive!

H4350 took the win between the two powders tested. Still no pressure signs on 80/81 gr. Very low ES/SD's too. Honestly each charge shot so well I'd go with either one, but I'm probably going to load up a few more of each and see if the point of impact stays consistent.

N550 kinda surprised me here. It has a fairly consistent point of impact accross 75/76/77 gr, but seemed more scattered. The ES/SD's were pretty up & down. 77 gr ended up getting a light bolt click on 2/3 shots so it is getting into pressure. Ill save this powder for another day.

H4350:

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N550:

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