The Firing Line Forums - View Single Post - imr 4198 and 65 gr Sierra Boatail (5.56 load)

Djmudge · August 19, 2013, 04:24 PM

so making sure on the 63gr loads for the 65 grain i call to verify and emailed. now both times the email and call tech said 69 gr recipe for the 65 since there BC and SD are so close. i ask even in a M4 platform. he said it is fine. so after loading some IMR 4198 and 65 gr GK. it seems fine. check to make sure of pressure problems . cases fine. no bulging or none ejection, but am shooting outta of 5.56 cases, not .223 cases. i started at the the recommended 18.3 but stopped at 19.3, .02 below max. worked fine . 1 1/2 groups at 100yds at 19.0 being the best. but i also have backups in the 55 gr hpbt just in case this didnt work.. but until i find some exterminator or acc2230, this will have to do.

August 19, 2013, 04:24 PM	#6
Djmudge Member Join Date: September 30, 2012 Location: Olive Branch, MS Posts: 32	so making sure on the 63gr loads for the 65 grain i call to verify and emailed. now both times the email and call tech said 69 gr recipe for the 65 since there BC and SD are so close. i ask even in a M4 platform. he said it is fine. so after loading some IMR 4198 and 65 gr GK. it seems fine. check to make sure of pressure problems . cases fine. no bulging or none ejection, but am shooting outta of 5.56 cases, not .223 cases. i started at the the recommended 18.3 but stopped at 19.3, .02 below max. worked fine . 1 1/2 groups at 100yds at 19.0 being the best. but i also have backups in the 55 gr hpbt just in case this didnt work.. but until i find some exterminator or acc2230, this will have to do. __________________ Iowa Hawkeyes