I am using CCI large pistol primers currently in my reloads for my 44mag. The load is 300gr XTP over 20grs of H110 seated at the last cannelure. The question is what benefit would I get by using Magnum primers? How much powder would you back off to use the Mag primers?
Magnum primers or not?
- Thread starter Big Mike
- Start date
Magnum primers are usually used with slow burning powders and it is indicated in the loading data exactly which primer is used.
Magnum primers can increase pressure by a lot or by a little - it isn't neccesarily safe to experiment. I would recommend using the loading data from the reloading manual.
Magnum primers can increase pressure by a lot or by a little - it isn't neccesarily safe to experiment. I would recommend using the loading data from the reloading manual.
If your load is getting warm, back off at least 15%, 20 is better. You'll be lighting a lot more powder, earlier.
If the load is pretty mild with a mid-buring rate powder (for the load) you may not even see a difference by going to the mag primer.
If the load is pretty mild with a mid-buring rate powder (for the load) you may not even see a difference by going to the mag primer.
Magnum primers are usually recommended for ball type powders like H110, Win 296 and Accurate No 9, all of which are similar burning rate and great for full power 44 mag loads. Watch your minimum loads as well, most manuals do not recommend "light" loads with the powders listed above, also a heavy crimp is usually suggested for reliable ignition.
From the Hodgdon site:
http://www.hodgdon.com/data/pistol/index.php
H110 Loads should not be reduced more than 3%. Reduce H110 Loads 3% and work up from there. H110 if reduced too much will cause inconsistent ignition. In some cases it will lodge a bullet in the barrel, causing a hazardous situation (Barrel Obstruction). This may cause severe personal injury or death to users or bystanders.
DO NOT REDUCE H110 LOADS BY MORE THAN 3%.
From the Hodgdon site:
http://www.hodgdon.com/data/pistol/index.php
H110 Loads should not be reduced more than 3%. Reduce H110 Loads 3% and work up from there. H110 if reduced too much will cause inconsistent ignition. In some cases it will lodge a bullet in the barrel, causing a hazardous situation (Barrel Obstruction). This may cause severe personal injury or death to users or bystanders.
DO NOT REDUCE H110 LOADS BY MORE THAN 3%.
- Location
- Calgary, AB
Yes, these slower burning magnum oriented powders are normally coated with a flame inhibitor (to slow the burn rate) which makes them more difficult to ignite in the first place; as opposed to uninhibited fast powders such as Bullseye where standard primers are quite adequate to light the fire.
