Videos tagged with IMR 4227

This video explores the critical differences between various gunpowder types, emphasizing that 'gunpowder isn't gunpowder.' It highlights how burn rate, powder shape (spherical vs. flake), and case volume significantly impact reloading outcomes for specific cartridges like the 300 Blackout and 308 Winchester. The discussion stresses the importance of consulting resources like the Hodgdon Reloading Data Center for optimal powder selection based on bullet weight, desired velocity, and pressure requirements to ensure safe and effective ammunition.

This guide details the process of reloading .300 Blackout ammunition using 135gr Sierra Varminter bullets, focusing on component selection, load data considerations, bullet seating, and quality control. The video highlights potential issues like powder compression, bullet setback due to insufficient neck tension, and pressure signs, offering practical advice from an experienced reloader. It emphasizes careful load development and observation of spent brass for safe and accurate handloads.

This YouTube video focuses on testing powder-coated bullets specifically with IMR-4227 powder in a 300 Blackout firearm. The content appears to be a range test or evaluation of this ammunition loading, likely intended for viewers interested in handloading or optimizing their 300 Blackout performance.

This video details the reloading and ballistic testing of 200gr Sierra Match King bullets in 300 Blackout. The instructor, with extensive experience in reloading and ballistics, evaluates two powders (IMR 4227 and IMR 4198) across two different firearms (8.5-inch and 16-inch barrels). The testing focuses on velocity, group size, and firearm function, providing data to help viewers select optimal loads for subsonic 300 Blackout applications.

This guide details a load workup for 300 Blackout supersonic ammunition using 168gr Hornady A-Max bullets with IMR 4227 and Winchester 296 (H110) powders. It covers brass preparation, priming, powder charging, bullet seating with attention to overall length, and crimping. The process emphasizes careful observation of pressure signs and group sizes during live-fire testing at 100 yards using a Lead Sled for stability. The instructor, with apparent reloading experience, highlights discrepancies in published load data and the importance of individual firearm testing.