Originally Posted by
RobinC
First, to answer the simple query, you match the bullet to the barrel, 1 in 8 twist is ideal for 60 to 80 gn bullets.
The COAL length is specific to the bullet, and the barrel free bore, (i.e where it touches), and is specifically importantly to the load, get it wrong, and you have high pressures!
The wife and I shoot at top level, and shoot Internationally at 300 mts, and load our own ammo (6mmBR and .223) to the highest standards, capable of world level scores at 300 mts, with .223 using 80 gns bullets in a 1 in 8 twist. I do not intend to go into any more detail.
Reloading if performed correctly is safe, BUT, there are big risks for the inexperienced, you are clearly very inexperienced. There are very high pressures involved, and very dangerous repercussions of getting it wrong, possibly fatal.
The NRA report they have seen several serious injuries in 2022 from reloading accidents, and they are considering and will likely be putting in mandatory requirements on reloaded ammo using Bisley and any MoD range.
The questions you are asking, raise serious concerns, and leads me to suggest that before you load any thing at all, that you get proven expert advice, face to face. I suggest you contact the NRA, and get on a NRA reloading course, or as a minimum any reloading course, and get advice from a proven expert.
As a bare minimum get a good book on the subject, and read it cover to cover, to at least understand the requirements, and the risks of getting it wrong, not only to you, but innocent bystanders, then get on a course.
The internet is not the place for you to start getting advice.
Take care, and Have Fun
Robin
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