What is the primary type of wood specified by IS 7549?

The standard specifies Indian or Kashmir walnut (Juglans regia) as the preferred timber (Clause 3.1).

What is the required moisture content for the timber blanks?

The moisture content shall not exceed 12 percent at the time of inspection (Clause 7.1).

What are the key requirements for grain direction?

The grain shall be reasonably straight. In the 'hand' or grip portion, the slope of the grain shall not be steeper than 1 in 15 (Clause 4.2).

IS 7549

: 1975

timber half-wrought for sporting rifles

CurrentSpecializedSpecificationMaterials Science · Timber and Timber Stores

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This standard specifies the requirements for half-wrought timber blanks used for manufacturing stocks for sporting rifles. It covers the material (primarily walnut), dimensions, tolerances, permissible defects, moisture content, and marking for the semi-finished wood components.

timber half-wrought for sporting rifles

Quick Reference Values

Maximum permissible moisture content12%

Minimum seasoning period for air seasoning12 months

Minimum slope of grain in the 'hand' (grip) section1 in 15

Practical Notes

The species of timber, typically Indian Walnut (Juglans regia), is critical for achieving the desired strength, stability, and aesthetic.

Careful inspection of grain direction and for defects like knots, splits, or cross-grains is essential, especially around the grip and action areas, as these can lead to catastrophic failure during use.

Verification of moisture content is crucial to prevent warping or cracking of the finished rifle stock.