Introduction. Microscopic research methods play an important role in forensic ballistic examination. Theoretical analysis. To carry out the linear and angular measurements of the following fields on the rifling shot bullets used various technical tools and techniques: eyepiece micrometers stereoscopic microscopes, measuring microscopes instrumental, rolling bullets on copy paper, etc. However, these tools do not always allow you to effectively solve the task. Experimental part. In this paper, on the basis of experimental studies, the recommendations on the use of the microscope MSP-1 and program «Micro-Analysis View» to measure the width and angle of the following fields rifling on bullets during a forensic ballistic examinations. Results. The proposed recommendations can reduce the study of bullets and, in general, provides a solution to the problem of determining model firearms.