THIS INFORMATION DOES NOT PRESUME TO BE CORRECT, OR SUITABLE FOR ANY PURPOSE WHATSOEVER. USE ENTIRELY AT YOUR OWN RISK.
Since August 2017, GS-Custom has not being honoring their orders. I have an outstanding order - that was paid for - two years old. I heard a rumor that they are no longer in business, and another rumor that they are only making bullets in the US for the US market. They have not replied to any of my requests for clarification.
Update 2019 : A reliable alternative to GS-Custom is Peregrine. Orders are fulfilled within two weeks, and customer support is prompt.
Velocity and power factor don't have any direct relation to performance in the field. Bullet type and construction are very important factors to consider with bullet weight and velocity, for any practical application.
Points to note are
Between those two points lie a lot of lessons that can be learned.
For more info on BASA, refer to the Big Bore site .
Load Data for .416 Ruger with Somchem powders
|380 GS Custom FP||Hornady||PMP LR Magnum||S335 Batch 682||71.7 gr||85.1 mm||2265|
|350gr Frontier Spartan HP||Hornady||PMP LR Magnum||S335 Batch 682||71.7 gr||84.0 mm||2311|
|330 GS Custom HP||Hornady||PMP LR Magnum||S335 Batch 696||69.4 gr||2283|
|330 GS Custom HP||Hornady||PMP LR Magnum||S335 Batch 696||71.3 gr||2315|
|330 GS Custom HP||Hornady||PMP LR Magnum||S335 Batch 696||72.4 gr||2374|
|245gr GS-Customer Hollow Point||Hornady||Federal 215||S335 Batch 706||81.0 gr||87.12 mm||2850|
|245gr GS-Customer Hollow Point||Hornady||Federal 215||S355 Batch 007||80.0 gr||87.12||2550|
380 grain GS-Custom feeding
The 380gr GS-Custom rounds as loaded fitted into the magazine. Rounds were crimped to a 1/8 turn worth of crimp applied with a Hornady seating die. Do not use any of these reloads in your 416 Ruger if they are not crimped. The recoil will knock the bullet back into the case.
This round feeds as long as there are only 2 rounds in the magazine. It seems that the pressure of the magazine spring with 3 rounds in it, when closing the bolt, pushes the nose of the top-most bullet too far past the bore axis, and it will not feed. Two rounds in the magazine work fine. It needs to be determined if a competent 'smith can sort this out, because I think these bullets are ideal for open-sight hunting with the caliber.
The rounds as loaded fitted into the magazine. Rounds were crimped to a 1/8 turn worth of crimp applied with a Hornady seating die. Do not use any of these reloads in your 416 Ruger if they are not crimped. The recoil will knock the bullet back into the case.
The 350gr Frontier Spartan HP feeds flawlessly.
The reloads met the velocity criteria.
The 350gr monolithic objective was 2300 fps, 2311 was achieved.
Pressure differences between all the rounds was not obvious from examining the primers, and all rounds extracted easily.