COL Question - 9mm CAM Pro 147gr RNFP

Factory 147gr 9mm ammo is certainly in the 950-1000fps range, but folks reloading for a shooting sport like IPSC or USPSA are more concerned about making minimum power factors required for the division they are competing in (projectile weight in gr's * FPS)/1000. For the Production dvision, the minimum PF is 125, so targeting a 130-135PF is pretty safe and gives a softer shooting load over factory ammo.

Suputin said:
Thats pretty slow. 147's should be in the 1000 fps range.
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At 860fps, I find the 147's tumble and is way too close to min power factor. I use 3.3-3.4gr N310 which is between 900-910fps which is good on accuracy and doesn't tumble.
 
Has anyone been happier with the 147gr bullets in the 9mm than the lighter 115 and 124's ? My Glock 17 seemed quite pleased with a couple boxes of AM 147 factory. Thinking about making my next box of CAMPRO's 147's

SORRY! If I hijacked the OP's thread.
 
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I find the recoil impulse much softer using 147gr projectiles and have found Campro to be great quality for IPSC and USPSA competition and casual plinking. Have not tested it for bullseye, but was able to ring a 8" dia steel plate at 50m :) The only thing I have noticed is that there is a noticeable difference in POI in my guns, so if your gun has fixed sights, you may want to test this and pick the ammo & load that best suits your POA.

NB Rifles said:
Has anyone been happier with the 147gr bullets in the 9mm than the lighter 115 and 124's ? My Glock 17 seemed quite pleased with a couple boxes of AM 147 factory. Thinking about making my next box of CAMPRO's 147's

SORRY! If I hijacked the OP's thread.
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Tested a batch of 3.3gr N320 under Campro 147gr at 1.060" COL in 3 different guns yesterday and getting pretty consistent results across all 3. Ran ~200 rounds through my bull barreled Grand Power X-Calibur during a practice yesterday and did have one failure to feed when my friend tried it. Looks like the round came in at too sharp an angle so the slide jammed it against the top of the chamber at ~ 40 degree angle. Never had that happen before in the X-Cal. Will just use the 1.060" COL batches for practice and keep an eye on that for now.

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So, I've now tried 4.0 and 4.2 grains of Unique at 1.120", with 147 grain Cam Pro, and found the difference to be like night and day. With 4.5 grains, I was all over the place, and the primers were getting flattened. At 4.0 and 4.2, I'm getting much better grouping. I'm going to try 3.8 next, and try to work out exactly which one will give the best results. So far, it's much better! Most importantly, I think that CamPro recommending 4.3 to 4.7 grains of Unique at 1.060" is a little on the unsafe side... They might want to reconsider that recommendation.
 
fyi - I noticed that Campro has updated their load data sheets to increase COL from 1.060 to 1.090 for their 147gr RNFP. I sent in an inquiry to check and this their response below:


We have increase the COL from 1.060 to 1.090 to make sure that the bullet feeds in different types of guns
and also reduce a little bit the pressure build up.

Thank you for using Cam Pro products
Best Regards
Patrick​
 
OAL is just a reference as it varies slightly from gun to gun, barrel to barrel. the best way to determine the OAL for your gun is a "drop-in" test.
load a dummy round long, take out your barrel and drop it in. the cartridge will not turn freely. and then adjust the seating to shorten the cartridge, little by little until the butt sits almost flush with the barrel mouth and can turn freely in the barrel.
that's your OAL. it should fall in the min/max range of the SAAMI standard(free pdf download online). then you are set. and don't be alerted if you get slightly different length from cartridge to cartridge if you are on a progressive press because due to the different situation at different station, the pressure on sizing could vary a little. as long as it's within the limit and fit the drop-in test, you are good.
 
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