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Had what appears to be this on some of my loads for 17 hornet, 2 out of 19. Using Lil Gun and also just started hand priming with RCBS hand primer. Had one on minimum load so I was hoping to put it down to not seating the primers deep enough. Is this plausible? Should I be squeezing shit out of the hand primer or just a nice firm squeeze?
Never heard of a primer leaking, you mean powder dribbling out ?Quote:
Originally Posted by charliehorse
Got a photo?
Would say he means gas escaping around the primer or puncturing it on firing.Quote:
Originally Posted by Max Headroom
Ah. Right.Quote:
Originally Posted by tetawa
Need some details Charliehorse,
I note that Lil Gun has a pretty narrow range of loads in the Hornet. Doubt if it is your primer seating.
Grandpamac.
Is it hornady brass?
I took a screenshot of a page from saubier.com, but the print was too small to post here.
The upshot: Hornady brass had some issues with primer leakage, so the fix was to use primers that were fractionally larger to fill the primer cup for a better seal.
What primerQuote:
Originally Posted by charliehorse
CCI primers and once fired FL sized hornady brass.
I ran 9.5g, 9.7g, 9.8g and 9.9g @grandpamac what do you need?
Those primers look pretty soft. Some load data including primer type, projectile and powder charge would help. Knocking out a primer to see if there is a pin hole in the corner between the face and side may tell you something. The smoking looks localized.
Assuming that you are using 20 grain projectiles your 9.5 grain load is below the Hodgdon start load. Some powders are very sensitive to sub max loads and the primers may not be expanding to seal in the case if the pockets are a little large. The surface of the primer looks dished in the photo which could be a sign of low pressure. Any problems with the first load assuming they were hand loads. Also hold the offending primer up to a strong light to see if there is a pinhole in the firing impression.
Grandpamac.
9.7g and 9.9g of lil gun gave me one each.
20g Vmax.
Hopefully get back out in the shed tonight and pop the primer out for a look
Funnily enough, both those loads grouped at .3moa
Which CCI primer are you using? How hard are they to seat?
Primers And Pressure
CCI 400. A good article thanks @zimmer it's me first time seating with the hand primer, wouldn't say it was overally hard to seat them but all ive been using is the press for my 22-250 so not even in the same boat. Waiting on a RCBS die so I can switch to hand priming for that.
Based on that I should try a different primer then
or different brass
CCI400 primers are too soft for the 17 Hornet. Use a harder primer. Or you may have a headspace problem; oversizing the brass which allows the primer to back out and leak.
I've got lots of experience loading for the .17 hornet,:P I had two, Both CZ sold one to GWH on here,
Get rid of the little gun its too prone to pressure problems, My results were similar, blown primers at starting loads.
I recommend, that you get a lb of CFE blackout, or N120, these are the stand out powders from my .17 hornet experience, H4198,(ADI 2207) and 4227 (2205) will be a little slow, but also less pressure.
Hornardy and resized .22 PPU hornet brass, are the same capacity, Winchester and Remington brass will have at least 10% more Capacity, this is were we run into pressure problems with .17 hornet,
I use a load of CFE blackout, 12.5gr, CCI 400 or WSR primers, Hornardy or PPU Brass, with a 20gr. 3650fps in a 20" CZ.
The 25gr V-max or Hollow point, at 3100-3200 fps are very effective, and there is no doubting a hit, the whump.
look after your brass, I neck size most of the time, Anneal when it gets hard, 5-8 firings, I am up over 15 firings now on sum Hornardy.:cool:
here's a couple previous threads for your info.
Saubier is the best place for further info, have fun and be very careful with little gun, its only 1/2 a grain between bang and boom.
https://www.nzhuntingandshooting.co....ght=.17+hornet
https://www.nzhuntingandshooting.co....ght=.17+hornet
Oh forgot to Add, early Hornardy factory loads, had dished heads, if yours are ,chuck them out, and a firm squeeze on the hand priming tool, stop once you fell resistance increase,
It may be worth the $20 or so, to get a primer pocket reamer, to get them all round and sized, sum .17 hornet, Hornardy factory ammo I had wasn't very good.
Well Charliehorse,
You seem to have plenty to work through now. A few more things I neglected to mention but will now add to the heap.
First, hand primer tools can seat the primers not quite straight in the case. After the initial seating I have always rotated the case 180 degrees in the case and applied a little more pressure. Often you will feel the primer seat a smidgen (to use a technical term) further. This will take some dexterity to stop the next primer feeding but is easy to master.
Second, if you are full length sizing only size enough to ensure that the case chambers freely. Your die may not contact the shell holder but this is fine.
And finally, to climb aboard one of my favourite hobby horses, if you can chronograph your loads this will give you a good understanding of pressure. If your velocities are close to the Hodgdon data (after adjusting for barrel length) then your pressures will be also.
You have been blessed with an interesting cartridge. Enjoy it.
Grandpamac.
Thanks, all good stuff. Back to the drawing board then. Hopefully the forum Chrony turns up soon so I can do some testing
