State v. Vuckovich, 203 P. 491 (Mont. 1921)

"The fact that the bullet taken from the body of the deceased may or may not have been removed secretly does not destroy its evidentiary value. Objection was made to the introduction of this evidence, especially as to the experiments made. It seems to be a well-established rule that it is largely within the discretion of the trial court to permit experiments to be made, and that caution should be exercised in receiving such evidence. It should be admitted only where it is obvious to the court from the nature of the experiments that the jury will be enlightened, rather than confused. Such evidence should not be excluded merely because it is not necessary in establishing the facts sought to be shown by the prosecution, if it tends to corroborate the position taken by the expert witness whose evidence has been received; for whenever the opinion of a person is admitted to be relevant the grounds on which it is based are also relevant."