pops1982

I dont think thats it because the readings were consistantly in the mid 1100's until I tilted the chrono as described and then after that they were consistanly in the mid 1000's. All of the readings were taken in 30 minutes or less.

Pops, how large a range did you get on the 1st and 2nd groups? My guess is that the first group was 1060 - 1180, or so?? I've seen myself, and in a posting here a few months ago, that for some reason, it's not uncommon for the velocity to "drop" as you keep shooting thru the screens? Barrel heat? I'd definitely try it again, but wouldn't be too surprised if you got very similar results. I'd make sure the LOWEST velocity cartridge had a power factor of 125.1 or a little higher - probably average around 130 - 132. Good luck, out of the 1st 26 only 2 were below 1100 (1084 & 1097). Then I tilted the chrono as describe to move the shadows of the diffusers over the reading slots and then out of the next 23 rounds only 1 was over 1100 (1106).

This very one: http://www.brianenos.com/forums/index.php?showtopic=157157

Do like me and use a yard stick.

Went to the range yesterday to chrono a load I'm working up. It was a partly cloudy sunny day and the sun was almost straight overhead. I assume this is not the best conditions for chronographing. I shot the first 24 rounds with the chrono pretty much level and the average fps was 1126. At that point I tilted the chrono just a little bit so that the difusers would cast a shadow on the openings of the chrono that do the reading and the average fps of the next 25 rounds dropped by 56 fps. I'm wondering if the reading with the chrono level and the openings not in a shadow are best or would the readings with the chrono tilted just a bit so that the diffusers cast the shadow on the openings are best. And then maybe I need to rechrono anyway on a day or time of day with better conditions. The first set of readings made PF (129) and the second set did not (123). Thanks for your help.

Yes they do and fast too.

Both primer options work equally well as long as you use dillons recommended lubrication procedures.

Well I wasn't feeling bad. I mean I was aiming at it...really.

Damn! You aim better than me.

This was the first time I used this chrono and I didn't notice any movement from it when I hit it.

Really? I thought I was the only one that could do this.

I can and I will show you because I have to bump the loads up a bit and chrono them again.

Thanks Roy I thought so.

GR8GIFT, like you I’m always very diligent about checking for the pin and always putting it back...until this time.

The other day I posted about a primer going off while reloading which was a first for me. Well today I filled a primer pickup tube and turned it over and watched all of the primers fall on the floor because I did not put the keeper pin back. Now that sucks!

So when you guys say more accurate are we talking fractions of an inch or what?

When working up a load is it a good idea to develop a load that allows the OAL to be as long as possible thereby putting the tip of the bullet as close to the rifling without actually touching it? Of course fitting in the magazine and cycling without problems will factor in.

Good advice. Thanks

I don’t and won’t wear hearing protection but I do wear eye protection. I was exaggerating a bit on the title because while it was loud it wasn’t that bad. No ringing in the ears or anything. As far as the primers in the fill tube I've had no issues with them going off (knocking on wood) and hope to never experience that.

I didnt see any thing but did notice a very small sliver coming off of one side of the primer as it was seated. Other than that it was good and flat, not sideways or crushed.

From what I've heard that will get your attention (and your neighbors). What brand primer? Federal sp 100

it was being seated in the empty case.

Found that out and they are already in the trash.

I've loaded maybe 15000 rounds on my 650 and I just had my first primer go off in the press. Now that will get your attention.