RL-19 and the 30-06

[redclay33]

I'm looking to work up a load for my (new to me) 30-06. The bullet would be a 165gr hornady and I have bunch of rl-19 to burn. My thought would be 56-59gr? Anybody have any experience with rl-19, too slow for this bullet?

[scope eye]

Hi if you can stuff 59gr in and still seat the bullet great, you will be in the 2700 FPS range and now where near max, if any more fits even better,

Tanks Dean

[Apache]

Look on their website for load data:

http://www.alliantpowder.com/reloaders/powderlist.aspx?type=1&powderid=13&cartridge=81

[scope eye]

It actually shows the 180gr faster than the 165gr with the same amount of powder, you know that ain't right.

Tanks Dean

[rusty815]

Might have something to do with their test load for the 180gr. round being about a tenth of an inch shorter than the 165gr. one, that and they don't list the barrel length, it could be a 24" barrel.

[redclay33]

It actually shows the 180gr faster than the 165gr with the same amount of powder, you know that ain't right.

Tanks Dean

I noticed that one as well. ?

[handirifle]

It actually shows the 180gr faster than the 165gr with the same amount of powder, you know that ain't right.

Tanks Dean

I disagree.

It could and most likely is right. The 180gr provides considerably more resistance, than the 165gr thus giving the powder time for that all important burn. If the 165 is slower, it's because the bullet is leaving the barrel before a complete powder burn is affected.

Now if the 165 was crimped, you might be able to boost velocity a bit.

[scope eye]

All things being equal, powder barrel length ect, the lighter bullet will have a higher muzzle velocity, and since they are both bullets are SPs it is a direct comparison, those are not my findings, it's ballistics.

Tanks Dean

[thomae]

I disagree.

It could and most likely is right. The 180gr provides considerably more resistance, than the 165gr thus giving the powder time for that all important burn. If the 165 is slower, it's because the bullet is leaving the barrel before a complete powder burn is affected.

Now if the 165 was crimped, you might be able to boost velocity a bit. Spot on. That is the same reason one sees a velocity decrease when the only variable changed is to moly coat the barrel/bullets. Less resistance between bullet and barrel, so the bullet takes less gas pressure (and less time) to slide down the length of the barrel. It sounds counter intuitive, but it really works that way. Because the bullet exits the barrel faster, there is less pressure (i.e., smaller amount of force) behind it, ergo lower velocity.