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rmr 75gr 224

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Viewing 4 posts - 1 through 4 (of 4 total)
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    Posts
  • April 3, 2024 at 3:27 pm #512580
    skinner1790
    Participant

    what is oal these should be seated to i am going to be testing with ramshot tac and cci 41 primers. where has everyone had luck. i see 24.1 is pretty popular i know i need to work up to what my rifle like. but some one said recommended to seat to 2.245?

    August 4, 2024 at 2:46 am #518369
    Dad_Wil
    Participant

    I think that your over all case length depends on your rifle…
    I would make sure that the bullet is not being jammed into the lands on the rifle…
    Erik Cortina did a you-tube interview with Speedy on determining length to lands…

    August 8, 2024 at 5:43 pm #518525
    Asking4afriend
    Participant

    The speedy method isn’t that speedy.

    I’m not sure that link is going to work. I have problems linking things in these forums.

    The video is called “How To Accurately Determine Cartridge Overall length” by Ian Wilson (there are other videos showing the same procedure). Ian shows you how to determine the Maximum Cartridge Overall Length (COAL) using a projectile of the proper diameter and a cleaning rod. Once you’ve calculated that, if you have a comparator you can measure the distance from cartridge base to bullet ogive of the dummy round. That measurement to the ogive is good for any caliber compatible bullet you’ll use in that rifle. It’s not dependent on bullet profile. If you change comparators you’ll have to measure the dummy round again as comparators are just that, comparators. They are not exact measuring devices.

    August 8, 2024 at 6:07 pm #518527
    Asking4afriend
    Participant

    Just for clarity I use a nylon coated cleaning rod, not a steel rod like Ian. I use a Parker Hale jag (rounded tip) on the rod to contact the bolt face and then the bullet nose. Make sure the firing pin isn’t protruding from the bolt face while making the first measurement. I use Possum Hollow cleaning rod stops rather than brass stops. A micrometer adjustable bullet seater takes the guess work out of setting the proper bullet depth for the dummy round.

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