Re: Do match primers really make a difference?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carter Mayfield</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: frankythefly</div><div class="ubbcode-body">This has been tested before, handloadermagazine.com (Dec-Jan 2009) conducted a test using a particular load and the only variable was the primer. In summary the changing in brand and type of primers can change group size up to .313 of inch.(Page 78 SciuChetti) I have done my own testing with wolf, cci br-2, and fed 210m. Everyone swore up and down about wolf primers and I guess I just got a bad lot because it ended up being the worst and I ended up not using them after 20 rounds, CCI Br-2 and Fed 210m:
H¬0: variances are equal
Ha: variances are not equal
2.)f-test
3.)α=.05
4.)Do not reject H0 if the p-value ≥ α
reject H0 if the p-value < α
5.) F-Test (Normal Distribution)
Test statistic = 0.82, p-value = 0.852
6.)since the p-value = .852 > .05, we do not reject the H0.
7.) Therefore, the variances may be assumed to be equal.
Between the Fed and CCI match primers the variances are equal using an alpha of .05, however I found that my groups where 8% better using the Feds..go figure. Since I live in Idaho getting the BR-2s have been a lot easier to get with the O-scare so that is what I have been using.
Also note that the above hand loader magazine test did not use wolf primers in the experiment, I know of world class palma shooters who swear by these, again I did not have such luck.</div></div>
Here is the problem with switching a component and running a test... the original load was developed based on a specific set of components. To do a true apples-to-apples comparison, you would have to work up a new load optimized to that primer.
Now I can see this working for match vs not match on the same brand as the targeted ignition energy is the same for match vs non match. But to test wolf vs federal vs CCI on a load that was originally worked up based on one of those primers is not a fair comparison.</div></div>
I would tend to disagree, I have a data table that keeps all things equal only thing that changed was the primers and it shows primers do make a difference. Funny thing I use BR-2s and they came in dead last. PM me and I'll send it to you.