Heym SR 30


Heym SR 30 is a straight-pull rifle produced in Germany by Heym. The rifle is also available in a left hand version.

Locking mechanism

The mechanism uses 6 ball bearings around the circumference of the bolt head as locking elements. When the bolt handle is pushed forward, it forces a central plunger down the interior of the bolt body, forcing the diameter ball bearings out to lock into negative shaped recesses in the receiver. The plunger retracts when the bolt handle is pulled back, allowing the locking bearing to retract into the bolt body so the bolt can open.
Primary extraction is performed by retracting the bolt handle, which uses leverage from the opposite side of the bolt to swing the handle to the open position, giving a mechanical advantage. The mechanism was designed Peter Fortner junior. Another example of a semi-rigid bolt lock is the Anschütz 1827 Fortner rifle, also designed by Peter Fortner junior.
Heym states they successfully had the SR 30 locking mechanism tested by the C.I.P. accredited Suhl proofhouse loaded up to a pressure of. The bolt can be classified as a semi-rigid type, since the locking elements are movably mounted on the bolt.
The bolt handle can be placed in three positions: Open, Locked and uncocked, and Locked and cocked.

Trigger

The rifle is offered with two trigger options, either a shotgun style trigger set at 1600 grams or a set trigger set to 1100 grams. To activate the lighter release, the set trigger must be pushed forward.

Calibers

The rifle is available in the two main configurations SR 30 N and SR 30 G.
;Normal action
;Magnum action
;Mini action

Barrels

The rifle comes with a hammer forged barrel made in-house at Heym. The SR 30 uses traditional action threads for fixing the barrel to the receiver. Barrel change must be performed by a competent gunsmith, and consists of setting the headspace as well as fitting the recoil lug between the barrel and stock.

Precision

The Heym High Performance Precision rifle variant is guaranteed by the factory to deliver a five shot group of 20 mm at 100 meters. This is equivalent to 0.72 inches at 100 yd, or just below 0.69 moa.