FREQUENTLY ASKED QUESTIONS
?: Which models come with the New GRS Adjustment System, Speedlock 2?
The GRS models Berserk, Hunter, and Sporter received a new and updated GRS SpeedLock system from March 2017 on. This new adjustment system locks on a maximum LOP of 30 mm.
The GRS models Bolthorn, X-Eater, and Hybrid will continue as before and will not be updated. This previous adjustment system has a 28 mm maximum LOP.
?: What is birch laminate wood?
Birch laminate wood is composed of thin layers of Birch glued together to create a block. The blocks we use in GRS have 65 layers of birch laminate, colored, dyed, and glued together. The color combinations on our stocks come from putting together different colors, gluing them together for different patterns.
Laminate is a very stable material when compared to normal hardwood. The glue component on each face of the laminate layer keeps it from moving. In a normal hardwood stock, all the fibers in the stock are oriented the same way. This means that wood is proportionally more affected by temperature and moisture than birch laminate. This increased stability of the material will affect its final stability.
Birch laminate stocks are chosen by competition shooters worldwide. Colour nuances will vary, which will give your stock a signature look.
?: What is the maximum caliber for the adjustable GRS stocks?
The adjustment system handles recoil up to and including a standard load 375H&H.
(300 grain bullet travelling at 2500F/S / 762M/S) or similar energy and performance. You need to use a silencer or muzzle brake when shooting cal. .338 LAPUA.
And remember, when shooting these calibers, you must ALWAYS GLASS BED YOUR RIFLE.
?: How do I mount the stock to my rifle?
Please read the instructions below. If you are unsure or not capable of doing the installation, please get help from your GRS dealer.
This installation is described as a standard bolt action rifle. (Tikka T3, Sako 85/75, Remington 700, Howa 1500)
Make sure the rifle is unloaded. Remove the bolt from the rifle.
Loosen and remove the action screw behind the trigger guard and the front action screw.
Remove the bottom metal.
Take the barreled action out of the original stock.
Place the barreled action in the GRS stock on the Tikka and Sako models, make sure the bedding block finds its place in the slot underneath the action. If it does not, you will see the action and barrel are not parallel to the stock and barrel channel.
Put the bottom metal in the GRS stock, make sure the magazine well (Remington, Howa models) is correctly placed in the bottom metal.
Insert the front and rear action screw and tighten loosely.
Tighten the front screw to: GRS Bifrost: 5.2nm // GRS Berserk: 5nm // GRS Laminate: 3-3.5nm
Tighten the rear screw to:
GRS Bifrost: 5.2nm GRS Berserk: 5nm GRS Laminate: 3-3.5nm
Inspect the action and barrel in the stock; does it look parallel? Does the hinged bottom metal work as it should? If you find any irregularities check if the magazine well is correctly placed in the bottom metal.
Put the bolt in the rifle, make sure the rifle is not loaded. Cycle the bolt, dry fire.
Check if the safety operates as it should.
You have now installed the GRS stock! Now go to the range, re-zero your rifle; the impact will shift because of the different recoil absorption.
A little unsure how to mount the BIFROST? Watch this step-by-step video.
?: Do GRS laminate stocks need glass bedding?
GRS recommends glass bedding all our laminate rifles stocks. The inlet is precisely made with CNC machines, and most models are drop-in, but we recommend glass bedding nonetheless.
In our experience, you will get better accuracy by glass bedding the action to the stock. Therefore we recommend doing so. Eliminating any possibility of bad accuracy is the name of the game.
THE FOLLOWING INLETS ALWAYS NEED GLASS BEDDING:
- Schultz & Larsen, Røssler Titan 6, Sauer 100, Blaser R8 professional, Blaser R93 OFFROAD/PROFESSIONAL
- All rifles in magnum calibers
The top three inlets are made to fit the original pillar bedding blocks. GRS does not provide these, so you need to get a new pair from your local distributor or use those in the original stock. The Blaser R8 and R93 stocks are made for the "professional" inlets (not the two-piece). These need to be glass bedded in the rear of the action where recoil is absorbed.
IMPORTANT: If the above-mentioned stocks are not glass bedded warranty is not valid.
- ALL rifles in magnum calibers (7mm Remington magnum, 300 and 338 Winchester magnum, 375 H&H, and cartridges with similar recoil) ALWAYS need bedding. This is to ensure a tight fit to the stock, helping recoil absorption. Magnum rifles have a higher risk of damaging the stock if not bedded than standard cartridges. This is due to the high energy in the recoil. If the stocks are glass bedded, it is no problem shooting these calibers.
Any questions, please ask your local GRS dealer.
?: Can GRS make inlets for any rifle?
GRS manufactures 4 different GRS models of GRS laminate rifle stocks for 35 different inlets and 8 different colors, some of which are in LH execution. We have concentrated on the rifles that are most used in the market. We are often asked if we can make any rifles, but I'm afraid we cannot do so.
However, we have a solution. We manufacture "blanks" in all our laminate models. Blanks are stocks that are not fitted for action and barrels but are otherwise finished. This means you can buy this stock and have a gunsmith do the inletting for you.
You will find the blank stocks' images under the different models.