Armory Sponsor
Posted: 3/10/2013 8:20:49 AM EDT
|
Hello im reloading some 30-06 with 42 gn of h335 and 180 gn btsp using a recipe from the LEE book, my question is, the minimum OAL is 3.300 but when i set the bullet to where the crimp grove is it measures out at 3.228. will this make a big difference as far as pressure goes or should i just seat at the recommended min OAL? edited title for you. dryflash3
|
|
Quoted:
Hello im reloading some 30-06 with 42 gn of h335 and 180 gn btsp using a recipe from the LEE book, my question is, the minimum OAL is 3.300 but when i set the bullet to where the crimp grove is it measures out at 3.228. will this make a big difference as far as pressure goes or should i just seat at the recommended min OAL? Which bullet are you using? |
|
That is Hodgdon's laboratory starting load, which should provide a good margin of safety.
It's hard to recommend going any lighter on the powder charge because light loadings can sometimes cause as much trouble as excessive charges do. If it were me, I'd start with 42 grains powder (because that's what the manufacturer suggests) and seat the bullet to the cannelure (which is, de-facto, the bullet manufacturer suggestion for seating depth). O.A.L. only tells you the conditions that were used to acquire the laboratory data in load manuals. These conditions rarely apply to specific bullets, rifles, or shooters in the field. You are starting at the minimums suggested by the powder and bullet manufacturers you've chosen. It doesn't seem you could be more prudent than that. |
|
Quoted: Hello im reloading some 30-06 with 42 gn of h335 and 180 gn btsp using a recipe from the LEE book, my question is, the minimum OAL is 3.300 but when i set the bullet to where the crimp grove is it measures out at 3.228. will this make a big difference as far as pressure goes or should i just seat at the recommended min OAL? edited title for you. dryflash3 With bottleneck rifle rounds (30-06) OAL can be adjusted from spec without fear from over pressure. You will be fine. You can get OAL too long and jam the bullet into the rifling, but that round would probably exceed the mag length and wouldn't feed anyway. With straight case pistol rounds, you can get into pressure problems seating shorter than the data. Did you check the OAL of your cases after sizing? That's important. Welcome to the forum.
|
Armory Sponsor