Heym SR 20

About the Heym

HEYM was founded in 1865, in Suhl, Germany, by Friedrich Wilhelm Heym. Throughout its history, the company has encountered many hardships. These include economic crises, the Nazi regime, and the post-WW II occupation of Germany. Consequently, it has changed its location more than once. Despite that, the Heym brand remains deeply respected and its guns widely admired.

As early as 1891, HEYM manufactured and patented the first hammerless drilling, a three-barreled hunting rifle with three triggers and three hammers on the same axis. Afterwards, the company began to expand, producing drillings, shotguns, and over and under rifle-shotgun combinations. They predominantly exported their products to Russia and the USA. In 1920, the company began producing Anson & Deeley Drillings, double rifle drillings, three trigger drillings, double rifles, and rifle shotgun combination guns.

After World War II, HEYM made a fresh start in the American part of divided Germany. There, the company manufactured products such as cuckoo clocks, slide rules, and spinning wheels since the ownership and making of guns were not allowed. HEYM restored its primary activity in 1952 when the revised laws again allowed the ownership and making of certain hunting and sporting guns.

In 1998, the owner of the company became Thomas Wolkmann. The company's name was first changed to HEYM Waffenfabrik GmbH (Limited), and then in 2007 to the present name, HEYM AG.

Heym SR 20 Rifle Review

Heym SR 20 is a push-feed bolt-action rifle and a long action version of the Heym SR series. In the middle of the 1960s, the Heym company signed a working agreement with Mauser to produce bolt-action rifles under the Mauser label. However, at the beginning of the '70s that deal was terminated and Heym renamed the existing products to the Heym SR series, including some minor changes in the design of their bolt-actions.

Like the SR 40 model, Heym SR 20 comes with a blued metal drilled and tapped receiver which houses a bolt with dual locking lugs that lock up with the action’s casing. Structurally, the rifles are the same, with the only major difference being the action length. Both utilize a Mauser-type locking system allowing for a smooth bolt operation and are available in both - left and right-side versions. Accordingly, the three-position safety catch which locks the bolt and the trigger can be positioned on either side. When safety is put in the middle position, the bolt can be safely opened for unloading the chamber.

Standard action magazine can hold up to five and the magnum action up to three cartridges which can be removed using a hinged floorplate. In addition, the user can choose between three trigger options, namely a single-stage adjustable, single set, or double set trigger that is surrounded by an aluminium trigger guard. The rifle features pre-mounted iron sights with the rear one having an adjustable elevation notch.

Possible barrel lengths for Heym SR 20 are 521 mm (20.5-inch), 597 mm (23.5-inch), 648 mm (25.5-inch).

Heym SR 20, chambered for .30-06 Spr.

Figure 1: Heym SR 20, chambered for .30-06 Spr. (Source. https://auctionet.com/sv/1542750-sr20-kal-30-06-25486/images#image_1)

Heym SR 20 can be chambered for the following calibres*:

5.6x57
.243 Win.
6.5x55
6.5x57
6.8x68
.270 Win.
7x57
7mm Rem. Mag.
7x64
.308 Win.
.30-06 Spr.
.300 Win. Mag.
9.3x62
.375 H&H Mag.

*Calibre choice depends on the variant.

The rifle is available in the following variants:

Heym SR 20 N
Heym SR 20 G
Heym SR 20 L

Heym SR 20, chambered for .30-06 Spr.

Figure 2: The receiver of Heym SR 20, chambered for .270 Win. (Source: https://www.gunsinternational.com/guns-for-sale-online/rifles/heym-rifles/heym-model-sr-20-l-full-stock-270.cfm?gun_id=100701867)

A: 21.9 mm

B: 103.2 mm

C: 12.7 mm

BHU: 4 mm

Ø: 6-48

R1: R14/30°

R2: R18

Which Rifles Have Interchangeable Mounts

Two-piece mounts

All the rifles listed in the category below have two-piece mounts interchangeable with Heym SR 20. To meet interchangeability conditions, two-piece mounts must match in all dimensions except the B distance. B distance can vary because two-piece mounts can be installed and adjusted closer or further apart. Rifles that meet such criteria are:

Remington 798
Kufstein 2165 Voere
Zastava M70 Bolt action
Parker Hale Safari 1200
Mauser M98 Standard
Mauser 2000
Mauser 3000

One-piece mounts

All the rifles listed in the category below have one-piece mounts interchangeable with Heym SR 20. For one-piece mounts to fit on a rifle, mounting surfaces on these rifles must match in every dimension. The rifle that shares the same dimensions and mounting surface with Heym SR 20 is:

Mauser 2000
Mauser 3000

Our Recommendations for Mounts

Fixed Mounts

If you are looking for a fixed mounting solution for your Heym SR 20, we recommend this reliable two-piece mount produced by the German company MAK that is made of steel and comes with a thirty-year warranty.

Detachable Repeatable Mounts

Detachable mounts can be easily installed and removed from the rifle which is especially useful for cleaning and maintenance purposes as well as versatility in using multiple optics on a single weapon. We recommend this detachable two-piece steel pivot mount made by the German company MAK that comes with a thirty-year warranty and is an ideal fit for the Heym SR 20.

Help Us Build Our Riflescope Mounts Database

If you happen to own this or any other rifle, we would appreciate it if you could help us expand our database by sending us some photos of the rifle receiver (the bare mounting surface of the rifle without the mounts installed). For your help, our company offers a fair return in terms of practical rewards.

Please send us an email for more information. You can contact us here: info@optics-trade.eu

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Rusan Pivot mount for Mauser M12, Yukon Photon, 30mm, one-piece

Rusan Pivot mount for Mauser M12, Yukon Photon, one-piece

€289.00

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Rusan Pivot mount for Mauser M12, ATN 4K, one-piece

€289.00

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Rusan Pivot mount for Mauser M12, Yukon Photon, 30mm, extra high

€264.00

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Rusan Pivot mount for Zastava M70, Yukon Photon, 30mm, one-piece

Rusan Pivot mount for Zastava M70, Yukon Photon, one-piece

€289.00

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Rusan Pivot mount for Zastava M70, ATN 4K, one-piece

€289.00

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INNOmount Pulsar Thermion Pivot Mount, Parker Hale Safari 1200

As low as €279.00

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INNOmount Pulsar Thermion Pivot Mount, Santa Barbara Mauser

As low as €279.00

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Rusan Pivot mount for Zastava M70, Yukon Photon, 30mm, extra high

€264.00

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The 30mm tube on these devices is used as a means of mounting when attaching them to a firearm. Typically, the mounting area is divided by the turret section, just like in conventional riflescopes.

The 30mm tube mounting standard on Pulsar Thermion 2 XP50 Pro

To attach these thermal scopes to a rifle, 30mm rings are required.

Thermal riflescopes that share this mounting standard

ATN ThOR 4 384 1-25-5x*
ATN ThOR 4 384 2-8x*
ATN ThOR 4 384 4.5-18x*
ATN ThOR 4 384 7-28x*
ATN ThOR 4 640 1-10x*
ATN ThOR 4 640 1.5-15x*
ATN ThOR 4 640 2.5-25x*
ATN ThOR 4 640 4-40x*
ATN ThOR LT 160 3-6x*
ATN ThOR LT 160 4-8x*
ATN ThOR LT 160 5-10x*
ATN ThOR LT 320 2-4x*
ATN ThOR LT 320 3-6x*
ATN ThOR LT 320 4-8x*
ATN ThOR LT 320 5-10x*
Conotech Night Arrow 335
Conotech Night Arrow 350
Conotech Night Arrow 635
Conotech Night Arrow 650
Guide TU420
Guide TU430
Guide TU450
Guide TU620
Guide TU630
Guide TU650
Hikmicro Stellar Pro SQ35
Hikmicro Stellar Pro SQ50
Hikmicro Stellar SH35
Hikmicro Stellar SH50
Hikmicro Stellar SQ35
Hikmicro Stellar SQ50
Infiray Tube TH35
Infiray Tube TH35 V2
Infiray Tube TH50
Infiray Tube TL35
Infiray Tube TL35 V2
Infiray Tube TL50
Lahoux Sight 25
Lahoux Sight 35
Lahoux Sight Elite 25
Lahoux Sight Elite 50
Liemke Sperber 1
Night Pearl Marten 420
Night Pearl Marten 430
Night Pearl Marten 450
Night Pearl Marten 620
Night Pearl Marten 630
Night Pearl Marten 650
Pulsar Thermion 2 LRF XG50
Pulsar Thermion 2 LRF XP50 Pro
Pulsar Thermion 2 LRF XQ50 Pro
Pulsar Thermion 2 XP50 Pro
Pulsar Thermion 2 XQ35 Pro
Pulsar Thermion 2 XQ50 Pro
Pulsar Thermion Duo DXP50
Pulsar Thermion Duo DXP55
Pulsar Thermion XM30
Pulsar Thermion XM38
Pulsar Thermion XM50
Pulsar Thermion XP38
Pulsar Thermion XP50
Pulsar Thermion XQ38
Pulsar Thermion XQ50
Thermtec Ares335
Thermtec Ares360
Thermtec Ares660

*named Mars instead of ThOR in the EU.

Night vision riflescopes that feature the tube mounting standard

ATN X-Sight 4K INT 3-14x
ATN X-Sight 4K INT 5-20x
ATN X-Sight 4K Pro 3-14x
ATN X-Sight 4K Pro 5-20x
ATN X-Sight LTV 3-9x
ATN X-Sight LTV 5-15x
Guide DU50
Hikmicro Alpex A50T
Hikmicro Alpex A50TN
Infiray Tube TD50L
Pard DS35
Pulsar Digex C50
Pulsar Digex N450
Pulsar Digex N455
Yukon Photon RT 4.5x42S
Yukon Photon XT 6.5x50S

Heym SR 20

About the Heym

Heym SR 20 Rifle Review

Heym SR 20 can be chambered for the following calibres*:

The rifle is available in the following variants: