Do these cases looked trimmed appropriately?

[Cult Hero]

So you will just seat deeper to get them to fit your pmags vs bolt? Do you notice any differences in velocity or accuracy?

I am currently experimenting and will more than likely end up with one load that I use as a workhorse load and one or two that become my specialty. That is the plan at least.

[MR_X]

Decreeing the OAL, decreases the internal volume of the case. When you do that the internal pressure increases. A little bit MIGHT be okay but as much as you doing is a bit too much for comfort. Then also take into consideration that the projectile you are using is pretty long so you are probably compressing your powder. This further increases the internal pressure and burn rate is increases. Think of the difference between a flare (controlled burn) vs a pipe bomb (compressed).

Not worth the risk.

[mark501w]

Yes, I liked .015 off the lands but, couldn't use the mag (bolt or auto) for repeating shots. So I load to mag length. You my find a cross over load that works great. I load to the individual rifle. Don't get me wrong I like single shots.

[mark501w]

IMR powders like to be compressed they're not like Ball powders the best loading density you can get is with compression.

[Cult Hero]

ha, now I am really confused. ha ha

[FormerBiker]

According to Hodgon's site IMR 4064 loaded to 21 gr w/ a 75gr jacketed should have the OL of 2.250 w/ case length of 1.750.

http://www.hodgdonreloading.com/data/rifle

[Cult Hero]

According to Hodgon's site IMR 4064 loaded to 21 gr w/ a 75gr jacketed should have the OL of 2.250 w/ case length of 1.750.

http://www.hodgdonreloading.com/data/rifle

Which is exactly what I went off of. Hornady don't have any online data so I checked with IMR.

[FormerBiker]

Which is exactly what I went off of. Hornady don't have any online data so I checked with IMR.

Just use your dial caliper and check the OL. If its is at that measurement you are good to go.

Glad you are being cautious. I know I'm overly so. Must have been all that physics I took.

[Cult Hero]

I already did. I checked every case that came off the trimmer and I checked every cartridge after I loaded it. They are all within 3/100'ths of an inch. I know the powder isn't compressed as I can hear it when I shake the cartridges.

[MR_X]

According to Hodgon's site IMR 4064 loaded to 21 gr w/ a 75gr jacketed should have the OL of 2.250 w/ case length of 1.750.

http://www.hodgdonreloading.com/data/rifle

Which is exactly what I went off of. Hornady don't have any online data so I checked with IMR.

That's because Hodgdon website used a Berger bullet which is shorter than the Hornady A-Max

http://www.accurateshooter.com/gear-reviews/bulletguide/

Hornady doesn't even have a recipe for IMR 4064 for that bullet.

[mark501w]

If your that worried take your hammer bullet puller & tap it out a little & readjust your die so that the cartridge bearly fits. I'am no fan of my pmags I like the metallic mag better.

[Cult Hero]

I am going to call Hornady tomorrow but the place I bought the bullets from told me just to shoot them. Said it should be fine.

Here is a better shot of they chamfering and a macro of the bullet

[MR_X]

Chamfering IMO is a bit excessive but not terrible.

[bsumoba]

I am going to call Hornady tomorrow but the place I bought the bullets from told me just to shoot them. Said it should be fine.

Here is a better shot of they chamfering and a macro of the bullet

I would do less chamfering on the brass. are you doing the inside as well?

The bullet just looks weird with the edge of the brass looking as if its overlapping the bullet.

I usually load my 77gr'ers @ 2.260" OAL, which are working in my pmags.

if the books say its okay, then its probably okay.

[Cult Hero]

I can back off the chamfering a little bit.